CN201487283U

CN201487283U - Large-caliber ball valve

Info

Publication number: CN201487283U
Application number: CN2009201654229U
Authority: CN
Inventors: 彭亚卫
Original assignee: ZHEJIANG TEJI VALVE CO Ltd
Current assignee: TEJI VALVE GROUP CO., LTD.
Priority date: 2009-08-17
Filing date: 2009-08-17
Publication date: 2010-05-26
Anticipated expiration: 2019-08-17

Abstract

The embodiment of the utility model discloses a large-caliber ball valve comprising a valve body, a ball body, a sealing ring, a lower valve stem and a driving device, also comprising a thrust rolling bearing arranged between the lower valve stem and the ball body. In the embodiment, through the thrust rolling bearing added between the lower valve stem and the ball body, the weight of the ball body is transferred to the lower valve stem through the thrust rolling bearing, when the valve is opened or closed, the ball body and the upper part of the thrust rolling bearing rotate, the lower valve stem does not rotate along the ball body, no friction exists between the ball body and the lower valve stem, and the torque is greatly reduced when the valve is opened and closed.

Description

A kind of heavy caliber ball valve

Technical field

The utility model relates to valve technology field, more particularly, relates to a kind of heavy caliber ball valve.

Background technique

Ball valve is a kind of part that blocks, mainly form by valve body, spheroid, seal ring, valve rod and drive unit, be provided with spheroid and seal ring in the valve body, and medium channel is arranged, described spheroid is an open-shut device of asking valve, has passage on it, it does rotation motion around the vertical center line of valve body, thereby realize the opening and closing of valve body, the lower end of valve body and spheroid flexibly connect, and can drive spheroid and rotate.Ball valve can be divided into straight-through type, Three way type, four-way formula and five-way formula.Be divided into fixedly two kinds of ball formulas and floating ball formula again.

Fixedly the spheroid of ball formula ball valve is fixed, and does not produce mobile behind the pressurized.Fixedly spherical ball valve all has floating valve seat, be subjected to pressure medium after, valve seat produce to move, and seal ring is pressed on the spheroid, to guarantee sealing.General conventional heavy caliber ball valve, i.e. the ball valve of DN (nominal diameter of pipeline) 〉=600mm, the moment of torsion of valve is all very big, and the drive unit that is adopted also increases thereupon.Fig. 1, shown in Fig. 2 is existing ball-valve structure, wherein 1 is O type circle, 2 is base, and 3 is gasket seal, and 4 is socket head screw, 5 is valve actuator, and 6 is spheroid, and 7 is sliding bearing, 8 is lower valve rod, as can be seen from the figure lower valve rod 8 supporting sepheres 6, the weight of spheroid 6 all is pressed on the lower valve rod 8, valve opening and when closing, lower valve rod 8 and spheroid 6 frictions are serious, and moment of torsion is very big.

The model utility content

In view of this, the utility model provides a kind of heavy caliber ball valve, with under cost-effective situation, and the moment of torsion when reducing valve opening and closing.

For achieving the above object, the utility model provides following technological scheme:

A kind of heavy caliber ball valve comprises valve body, spheroid, seal ring, lower valve rod and drive unit, also comprises the thrust bearing that is arranged between described lower valve rod and the described spheroid.

Preferred above-mentioned heavy caliber ball valve, described thrust bearing is a thrust ball bearing.

From above-mentioned technological scheme as can be seen, the utility model embodiment is by adding thrust bearing between lower valve rod and spheroid, make the weight of spheroid be delivered on the lower valve rod by thrust bearing, when valve opening or when closing, upper half part of spheroid and thrust bearing is rotated, lower valve rod does not rotate with spheroid, no any friction between spheroid and the lower valve rod, and valve opening and the moment of torsion when closing reduce greatly.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a heavy caliber ball valve schematic representation in the prior art;

Fig. 2 is the partial enlarged drawing of A among Fig. 1;

Fig. 3 provides heavy caliber ball valve schematic representation for the utility model embodiment;

Fig. 4 is the partial enlarged drawing of B among Fig. 3.

Embodiment

The utility model embodiment discloses a kind of heavy caliber ball valve, with under cost-effective situation, and the moment of torsion when reducing valve opening and closing.

The utility model provides a solution, its basic thought is: avoid spheroid directly to contact with lower valve rod, select the less thrust bearing of friction factor to be arranged between spheroid and the lower valve rod, thereby avoided the friction between spheroid and the lower valve rod, reduced moment of torsion greatly.

Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

See also Fig. 3, Fig. 4, Fig. 3 provides heavy caliber ball valve schematic representation for the utility model embodiment, and Fig. 4 is the partial enlarged drawing of B among Fig. 3.

Wherein 1 is O type circle, and 2 is base, and 3 is gasket seal, and 4 is socket head screw, and 5 is valve actuator, and 6 is spheroid, and 7 is sliding bearing, and 8 is lower valve rod, and 9 is thrust bearing

O type circle 1 is arranged on the lower valve rod 8, is used for sealing; Base 2 is installed on the valve body by socket head screw 4; Being provided with gasket seal 3 between base 2 and lower valve rod 8, is in order to seal equally; Spheroid 6 is pressed on the lower valve rod 8, the surface of lower valve rod 8 is provided with sliding bearing 7, in order to reduce moment of torsion, between spheroid 6 and lower valve rod 8, be provided with thrust bearing 9, make that the weight of spheroid 6 is not directly to be pressed on the lower valve rod 8, but be delivered on the lower valve rod 8 by thrust bearing 9, when valve opening or when closing, upper half part of spheroid 6 and thrust bearing 9 is rotated, lower half portion of rolling bearing 9 and lower valve rod 8 do not rotate with spheroid 6, and no any friction between spheroid 6 and the lower valve rod 8 makes the moment of torsion of valve opening when closing reduce greatly, above-mentioned thrust bearing 9 can be thrust ball bearing, thrust roller bearing etc.

Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with embodiment's disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.

To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. a heavy caliber ball valve comprises valve body, spheroid, seal ring, lower valve rod and drive unit, it is characterized in that, also comprises the thrust bearing that is arranged between described lower valve rod and the described spheroid.

2. heavy caliber ball valve as claimed in claim 1 is characterized in that, described thrust bearing is a thrust ball bearing.