CN2483570Y

CN2483570Y - Rail ball valve

Info

Publication number: CN2483570Y
Application number: CN 01206627
Authority: CN
Inventors: 王明忠; 王德华
Original assignee: Sichuan Petroleum Administration Bureau
Current assignee: Sichuan Petroleum Administration Bureau
Priority date: 2001-06-21
Filing date: 2001-06-21
Publication date: 2002-03-27
Anticipated expiration: 2011-06-21

Abstract

A track ball valve which is used in the control of liquid and gas transportation pipes belongs to a valve-manufacturing technology field. The currently used track ball valve will produce leakage when impurities in transportation medium are adhesive to a sealing surface, therefore after running long time, the impurities will sedimentate inside a bush. The utility model comprises a double sealing seat, a bottom dustproof and flushing structure and an external oil nipple, and realizes soft and hard dual sealing to a ball surface of the ball valve. A dustproof cover of the bottom dustproof and flushing structure can effectively prevent micro particles from falling into the bush, and the dust can be flushed away through a bottom flushing hole, and the external oil nipple can be injected into lubrication grease, therefore reducing the closing and opening moment of the ball valve and lowering the labor intensity.

Description

A kind of track ball valve

A kind of track ball valve is used for the control of various liquid, gas transmission pipeline, belongs to the manufacturing technology field of valve.

In the prior art, employed track ball valve is mainly introduced by foreign country or is produced by co-partnership company, these valves have less switch moment, simultaneously, its sealability is also better, but, the shortcoming of prior art is: at present at the track ball valve of usefulness, what adopt in the sealing of valve seat and sphere is hard sealing or soft seal, when the track ball valve of the hard sealing of employing has fine impurities to stick on the sealing surface in running into fed sheet of a media, will be poorly sealed, occur leaking, adopt the track ball valve of soft seal, its working pressure and working life all can be received bigger limitation, and, because the lining of track ball valve is a concave structure, therefore, after the use of a period of time, can the deposition dust in the lining, dust is many will have a strong impact on the switch flexibility and the sealing effect of ball valve.

The purpose of this utility model is to design a kind of track ball valve, and it has dual sealing surface, has to prevent that dust from falling into the dirt-proof boot of lining, can also wash dust from the bottom, and can be implemented in line replacing valve seat.

The utility model is achieved in that the utility model comprises the double seal seat, three parts are chewed in dustproof flushing mechanism in bottom and outside oiling, the double seal seat is provided with one soft seal circle with hard sealing surface, can realize the soft or hard double seal to the sphere of ball valve, the edge of valve seat is provided with the valve seat handling hole, can realize the online loading and unloading of valve seat, the dustproof flushing mechanism in bottom comprises the boot seal that is enclosed within the ball valve bottom, be located at heavy ash-pit and the flushing hole of opening in the lining in valve body lower portion, boot seal can effectively prevent to be fallen in the lining by the molecule that medium is brought into, after moving for a long time, a spot of dust enters lining, also can fall in the heavy ash-pit that is located at lining, flushing hole bottom valve body is with the dust flush away, be located at outside oiling on the valve gap and chew and to inject lubricant grease, the switch moment of ball valve is reduced greatly, can also play the better seal effect.

The utility model has the advantages that: owing to be the soft or hard double seal, can play the complementary effect of sealing, the dustproof flushing mechanism of bottom can prevent effectively that particulate from entering lining and washing the dust that is deposited in the heavy ash-pit in lining bottom with being convenient to from the bottom, inject lubricant grease by the outside, can reach the effect that reduces working strength and improve sealing effect, valve seat of the present utility model can also be realized online replacing.

Fig. 1 is an assembly structure figure of the present utility model.

Fig. 2 is 6,7,8,9 an amplification sectional structure chart among the utility model Fig. 1.

Fig. 3 is the plan structure figure of lining 6 among the utility model Fig. 1.

Fig. 4 be among the utility model Fig. 1 valve seat 10 face structural drawing.

Provide embodiment of the present utility model below in conjunction with accompanying drawing: the utility model is included in the dustproof flushing mechanism in dismountable double seal seat 10, bottom that is provided with in the valve body and 2 three parts are chewed in the outside oiling that is arranged on the valve gap, double seal seat 10 is provided with one soft seal circle 3 with hard sealing surface 4, and the edge of double seal seat 10 is provided with valve seat handling hole 12; The dustproof flushing mechanism that is located at the valve body bottom comprises the boot seal 5 that is enclosed within the ball valve bottom, is located at heavy ash-pit 11, flushing hole 9 in the lining, packing ring 8 and shutoff gong bolt 7, and the outside on valve gap is provided with oiling and chews 2; In use, chew 2 by oiling and inject lubricant grease, make the switch of ball valve very light, can also play the better seal effect, the soft seal circle 3 that is arranged on the double seal seat 10 is higher slightly than hard sealing surface 4, during throttle down, under the active force of valve rod, soft seal circle 3 will be driven plain, seal with the sealing sphere of hard sealing surface 4 to ball valve, after service time is long, when double seal valve seat 10 needs to change, open valve gap, handling instrument is inserted in the valve seat handling hole 12 at double seal valve seat 10 edges, turn double seal valve seat 10 is pulled down old double seal valve seat 10, loads onto the on-bne repair that new double seal valve seat 10 can be realized valve; In the using process of valve, small dust drops on the sealing sphere of ball valve, owing to the complementation of soft and hard seal reaches the good result of sealing fully, in the running of valve, owing to tightly be enclosed within the effect of the dirt-proof boot 5 of ball valve bottom, the molecule that fed sheet of a media is brought into can not fall in the lining 6, for a long time after the operation, entering dusts in the lining 6 can be deposited in the heavy ash-pit 11 in the lining 6, at this moment, as long as open shutoff bolt 7, by the bottom dust in the heavy ash-pit 11 is washed the purpose that just can reach dusts in the removing lining 6, load onto shutoff bolt 7 and just can continue to put into production.

Claims

1. track ball valve, by valve body, valve core, valve gap, valve rod and handle constitute, its special seized with terror being:

A. be provided with dismountable double seal seat in valve body, the double seal seat is provided with one soft seal circle with hard sealing surface, and the edge of valve seat is provided with the valve seat handling hole;

B. be provided with dustproof flushing mechanism in the bottom of valve body, comprise the dirt-proof boot and the heavy ash-pit that is located in the lining, flushing hole, packing ring and shutoff gong bolt that are enclosed within the ball valve bottom;

C. valve gap is provided with outside oiling and chews.