CN201236959Y

CN201236959Y - Heat preserving stop cock

Info

Publication number: CN201236959Y
Application number: CNU2008200550938U
Authority: CN
Inventors: 胡侃; 吕瑞龙; 周游; 吕海燕
Original assignee: SHANGHAI FUDI VALVE CO Ltd
Current assignee: SHANGHAI FUDI VALVE CO Ltd
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2009-05-13
Anticipated expiration: 2018-01-25

Abstract

The utility model relates to a heat-preservation plug valve installed on a petrochemical fluid delivery pipeline, which belongs to the technical field of the valve. The plug valve comprises an inner sleeve, a plug, a spring, an upper gland, a lower gland, an outer sleeve, a flange plate and air inlet and outlet holes, and is characterized in that the outer sleeve which is arranged outside the inner sleeve, welded into a whole with the inner sleeve and forms the valve body with the inner sleeve is spherical, the taper of the plug in the inner sleeve is 1:8, and the caliber of a channel in the middle of the plug is consistent with that of a pipeline outside; and the utility model has the advantages of good heat preservation performance, no resistance, good sealing performance and no leakage. Since the outer sleeve of the valve adopts the spherical structure, not only the heat preservation cavity is enlarged, the heat preservation performance is enhanced, and meanwhile, the diameters of the inner sleeve and the plug are sufficiently extended, thereby playing the role of decisive action to the consistency of the calibers of the middle channel of the plug and the pipeline outside.

Description

A kind of insulation stopcock

[technical field]

The utility model relates to valve technology field, a kind of specifically ball-type insulation stopcock of installing on oil, chemical industry fluid-transporting tubing.

[background technique]

The insulation stopcock that uses in the existing fluid-transporting tubing, because the valve overcoat is the square structure, incubation cavity is little, thermal insulation property is undesirable, the passage bore of valve plug is less than the bore of external pipe, and MEDIA FLOW is hindered when valve, make changing property resistance in the pipeline, very big to the pipeline influence, flow also reduces many, also has the diameter of stopper little, sealing surface is also little, and sealability is undesirable; The tapering of stopper big (being 1:20), and elongated passage in addition makes medium produce the thrust that makes progress to stopper, and this is the maximum hidden danger of this valve seepage.

[summary of the invention]

The purpose of this utility model is exactly to overcome the deficiency that prior art exists, and more reasonable structure is produced in design, and the better a kind of ball-type of usability is incubated without hindrance stopcock.

Technical solution of the present utility model for achieving the above object is, existing insulation stopcock is improved, and changes original square overcoat into ball-type, and to enlarge the volume of incubation cavity, the diameter of cover and stopper is expanded fully in also making simultaneously; The tapering of stopper is reduced to 1:8, increases the diameter of stopper, make the middle passage bore of stopper consistent with the bore of external pipe.

The beneficial effects of the utility model have good heat insulating, non-resistance, good seal, the characteristics of ne-leakage.Because the overcoat of this valve has adopted the ball-type structure, not only incubation cavity enlarges, thermal insulation property improves, simultaneously also make the diameter of interior cover, stopper obtain abundant expansion, this has played conclusive effect to the center-aisle that guarantees stopper and external pipe bore consistent, flow was constant when matter Jie flowed through valve, non-resistance.The stopper diameter increases, and the sealing surface that stopper cooperates with interior cover increases, and makes sealability obtain optimum efficiency.The tapering of stopper reduces, and the thrust that interior pressure makes progress to stopper has been eliminated the maximum hidden danger of valve seepage less than the gravity of self.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

[specific embodiment]

Below in conjunction with the drawings and specific embodiments the utility model is described in detail:

With reference to Fig. 1, the valve body that the overcoat 6 of cover 1 and ball-type was welded as a whole and is constituted in the structure of insulation stopcock of the present utility model comprised, tapering in interior cover 1 is 1:8, the middle passage bore stopper 2 consistent with the external pipe bore, be enclosed within the spring 3 on the last connecting rod of stopper 2, be pressed in the upper press cover of fixing with nut 4 on spring 3 tops, the lower cover 5 that on interior cover 1 port below the stopper 2, is being screwed, with two flange plate 7 that welding at overcoat 6 two ends of ball-type, and have advancing more than 14 at least uniform on the circumference of two flange plate 7, air outlet hole 8 is formed.

Claims

1, a kind of insulation stopcock, it comprises interior cover, stopper, spring, upper press cover, lower cover, overcoat, flange plate and into and out of pore, the overcoat that it is characterized in that being welded as a whole at the outer and inner cover of interior cover, constitutes valve body with interior cover is a ball-type, the tapering of the stopper in interior cover is 1:8, and the passage bore in the middle of the stopper is consistent with the bore of external pipe.