CN2134573Y

CN2134573Y - Oblique plane sealing pipe joint for increasing sealing property

Info

Publication number: CN2134573Y
Application number: CN 92219155
Authority: CN
Inventors: 张庆新
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-23
Filing date: 1992-06-23
Publication date: 1993-05-26
Anticipated expiration: 2002-06-23

Abstract

The utility model relates to an oblique plane sealing pipe joint for increasing sealing property, composed of a main body, a sealing gasket, a pipe clamp and a screw cap. Because of the reasonable inclined plane rake angle and pipe clamp rake angle, the sealing performance and clamp force of the pipe joint are improved, guaranteeing engineering mounting quality.

Description

Oblique plane sealing pipe joint for increasing sealing property

The utility model relates to a kind of engineering part, in particular for the pipe joint of piping erection.

In the piping erection, the sealability of inclined-plane sealed pipe joint affects the project installation quality, and the bevel angle of pipe joint is determining the sealing effect of pipe joint, and the bevel angle of existing pipe joint is 7 degree or 32 degree.Its sealing effect is undesirable, or coincide bad or press partially.

The purpose of this utility model is to propose a desirable bevel angle, makes the sealing effect of pipe joint reach best.

As Fig. 1, pipe joint is by body ︱ 1 ︱, sealing gasket ︱ 2 ︱, and pipe clamp ︱ 3 ︱ and nut ︱ 4 ︱ constitute.The sealing effect of inclined-plane sealed pipe joint depends on the axial force P that is added on the rubber gasket ₁Component (Q on the inclined-plane Vertical direction ₁=sin α) and the surface area on inclined-plane (F=π ((R ²)/2+(r ²)/2) l=π ((R ²)/2+(r ²)/2) (R-r-chamfer dimesion) is (l)/(Sin α) because of Q ₁Can be by screwing the numerical value that nut is adjusted to be needed, so the surface area on inclined-plane has decisive action to sealing effect.And R and r are determined by pipe joint structure, so sealability depends on sin α, and reducing and increase with the oblique angle α on inclined-plane; α is too small, and the truncated cone bus is long, and sealing effect can reduce because of the inclined-plane discontinuity; α is excessive, and the truncated cone bus is too short.Sealing gasket and body inclined-plane identical bad easily pressed partially, and sealing effect also can reduce.

The best value of α is between 25 °-30 °, and optimum is α=28 °

The same chucking power of selecting a suitable pipe clamp oblique angle β can improve pipe.The chucking power of pipe depends on when screwing nut, axial force P ₁Vertical stress component (Q at tube surface ₃=Q ₂Cos β=P ₁Sin β cos β), P ₁Can adjust to and need numerical value by screwing nut, so chucking power by pipe clamp oblique angle β decision, and depends on sin β cos β value.

The big more chucking power in β angle is big more, but the β angle is limited by joint structure, can not be too big, can between 20-25 °, choose, and optimum is 25 °.

The utility model has not only improved the sealability of inclined-plane sealed pipe joint owing to selected rational bevel angle, has also improved chucking power, has guaranteed the quality that pipe connects.

Description of drawings.Fig. 1 is an inclined-plane sealed pipe joint schematic representation, and Fig. 2 is force analysis figure, and Fig. 3 is long-pending for chamfered surface, and Fig. 4 is pipe clamp inclined-plane force analysis figure.

Claims

1, improve the inclined-plane sealed pipe joint of sealability, by body [1], sealing gasket [2], pipe clamp [3] and nut [4] constitute; It is characterized in that body [1] is 25-30 ° with the inclination angle of inclined plane of sealing gasket [2] pressing, the pipe clamp inclination angle is 20-25 ℃.

2, pipe joint according to claim 1 is characterized in that: inclination angle of inclined plane is 28 °, and the pipe clamp inclination angle is 25 °.