CN201836443U

CN201836443U - Fixed ball valve

Info

Publication number: CN201836443U
Application number: CN2010206042221U
Authority: CN
Inventors: 王龙骧; 柳卫东; 董琪
Original assignee: Neway Valve Suzhou Co Ltd
Current assignee: Neway Valve Suzhou Co Ltd
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2011-05-18
Anticipated expiration: 2020-11-12

Abstract

The utility model discloses a fixed ball valve which comprises a valve body, a valve seat, a valve cover, a ball body and a valve rod. The ball body and the valve rod adopt an integrated structure; the bottom part of the ball body is directly supported by the valve seat; and the top part of the ball body is positioned in a matching way by the valve rod integrally connected with the ball body through a bearing between the valve rod and the valve cover. The fixed ball valve completely avoids a present positioning structure, thereby greatly lowering not only the processing precision of parts but also the processing difficulty of a part machine of the ball valve; in addition, the fixed ball valve is more beneficial for ensuring performances.

Description

A kind of fixing ball valve

Technical field

The utility model relates to a kind of valve, is specifically related to a kind of fixing ball valve.

Background technique

Fixing ball valve, it is high-performance ball valve of new generation, wherein, last dress formula fixing ball valve is because its outer leak source is few, and the pipe stress that bears is less, and shock resistance is good, can realize the on-line maintenance of valve very easily and change filler etc., therefore greatly reduce the maintenance cost of valve,, valve seal performance, fields such as nuclear power that maintenance requirement is high have been obtained extensive use in the applying working condition harshness.Wherein, it is very extensive in the application in nuclear power field that small-bore (DN50 and following) goes up dress formula fixing ball valve.

The existing dress formula fixing ball valve of going up is referring to shown in Figure 1, comprise valve body 1, valve seat 2, valve gap 3, spheroid 4 and valve rod 5, wherein, spheroid and valve rod are two independent parts, the location of spheroid in valve body is by processing two sections ball journals 6 at the spheroid upper/lower terminal, respectively in the corresponding position processing ball journal hole of valve body and valve gap, cooperate by bearing 7 between ball journal and ball journal hole, thereby realization is to the location of spheroid simultaneously.

Yet, there is following defective in the fixing ball valve of said structure: in order to realize the accurate location of spheroid, the processing of spheroid upper/lower terminal ball journal, ball journal hole on the valve body and the machining accuracy of valve flowing channel etc. are required just quite high, if can not guarantee fully that the machining accuracy of parts such as spheroid, valve body will cause the sealability of valve to be subjected to very big influence; In addition, for small-bore fixing ball valve, because the size of its all parts is all less relatively, itself is just very difficult aspect part processing, therefore to further guarantee just difficulty more of higher precision, all be difficult to guarantee as the machining accuracy of two sections ball journals that are used to locate of processing and valve body on spheroid etc.

Summary of the invention

The utility model purpose provides a kind of fixing ball valve, to reduce the requirement of its part processing precision.

For achieving the above object, the technical solution adopted in the utility model is: a kind of fixing ball valve, comprise valve body, valve seat, valve gap, spheroid and valve rod, and described spheroid and valve rod are structure as a whole; The bottom of described spheroid is directly supported by valve seat, and the valve rod that the top of spheroid connects through one cooperates the location by the bearing of valve rod and valve cover chamber.

Promptly spheroid and valve rod are made of one structure, this accurately locatees at part processing, spheroid, aspect such as valve seal performance realization all is practicable for lighter small-bore of spheroid and valve rod gross weight gone up dress formula fixing ball valve.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1, the utility model is made of one structure with spheroid and valve rod, and spheroid bottom relies on the valve seat of two ends pretension to realize support to spheroid, and vertical direction to spheroid have certain self-regulation, to positive interaction, error that can the adequate compensation assembling; And can directly rely on the bearing of valve rod and valve cover chamber and the acting in conjunction of filler that spheroid is carried out the accurate location of substantially horizontal at the spheroid top, and then guarantee the valve excellent sealing ability; Therefore, this fixing ball valve has been avoided existing position structure fully, promptly need not at spheroid upper/lower terminal processing ball journal, also need not the ball journal hole that processing cooperates on valve body and valve gap, thereby greatly reduce the machining accuracy of part, reduced the mach difficulty of such ball valve part, also more favourable to the performance that guarantees valve.

2, ball-valve structure of the present utility model helps the online fast assembling-disassembling and the maintenance of this fixing ball valve, can effectively save the maintenance cost of such valve.

3, of the present utility model simple in structure, be easy to processing and fabricating, be specially adapted to the very harsh field of applying working condition, as the nuclear power application.

Description of drawings

Fig. 1 is the structural representation of fixing ball valve in the background technique;

Fig. 2 is the utility model embodiment one a partial sectional view.

Wherein: 1, valve body; 2, valve seat; 3, valve gap; 4, spheroid; 5, valve rod; 6, ball journal; 7, bearing.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one

Referring to shown in Figure 2, a kind of fixing ball valve comprises valve body 1, valve seat 2, valve gap 3, spheroid 4 and valve rod 5, and described spheroid and valve rod are structure as a whole; The bottom of described spheroid is directly supported by valve seat, and the valve rod that the top of spheroid connects through one cooperates the location by the bearing 7 of valve rod and valve cover chamber.Valve rod is not analysed and observe among Fig. 2.

This is to realize especially easily for small-bore fixing ball valve, this is because the spheroid and the valve rod gross weight of small-bore fixing ball valve is lighter, and the part that processing spheroid and valve rod are designed to one under the condition that current machining apparatus ability satisfies is fully realized than being easier to.

Claims

1. a fixing ball valve comprises valve body (1), valve seat (2), valve gap (3), spheroid (4) and valve rod (5), and it is characterized in that: described spheroid and valve rod are structure as a whole; The bottom of described spheroid is directly supported by valve seat, and the valve rod that the top of spheroid connects through one cooperates the location by the bearing (7) of valve rod and valve cover chamber.