CN101949449A

CN101949449A - Sealing ring

Info

Publication number: CN101949449A
Application number: CN 201010283844
Authority: CN
Inventors: 綦晓平; 周庆志; 李中生
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2011-01-19

Abstract

The invention relates to a sealing ring for a pressure test of a liquid pressure pipeline. The sealing ring comprises a rigid frame and a hemp rope layer, wherein the hemp rope layer is uniformly wound outside the rigid frame. The sealing ring has the advantages of long service life, low cost and no adhesion to the pipeline.

Description

A kind of seal ring

Technical field

The present invention relates to a kind of liquid pressure conduit pressure testing seal ring.

Background technique

The conveying of fluid at present is most of to rely on pressure piping, and the leakproof of pipeline is most important, so pipeline must pursue a test before installation.To seal the pipe port on the testing apparatus, water filling, pressurization, pressurize, thereby finish test to pipe.

But in the reality test, the used sealing material of pipe port all is a rubber product, and there is following defective in this material: one, poor toughness, and rubber tubulation mouth sealing ring is after using several times, and strain cracking causes sealing to weaken, and is poorly sealed; Two, poor durability, rubber tubulation mouth sealing ring is subjected to the restriction of its rubber property, can not be repeatedly used, and causes input amount big, and cost can be in any more; Three, bonding body, damaged gradually along with the continuation of rubber tubulation mouth sealing ring is used with mouth of pipe contact position, at last pipe is blocked tightly, can't make pipe and its disengaging.

Summary of the invention:

In order to overcome the shortcoming of prior art, the invention provides a kind of seal ring, its long service life, cost is low, not bonding pipe.

The present invention solves the technological scheme that its technical problem takes: it comprises rigid backbone and rope made of hemp layer, and described rigid backbone evenly is wound with rope made of hemp layer outward.

The thickness of described rigid backbone is 0-20mm.

The thickness of described rigid backbone is 0mm, does not promptly have rigid backbone.

The outer contour shape of described rope made of hemp layer cross section is rectangle, circle or semicircle.

The present invention makes full use of the toughness of fiber crops, and there is not stress in inside, braiding back, prevents bonding to pipe effectively.Can guarantee more effective sealed port in test pipe seepage, good toughness, service time is long, reduces cost significantly.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the first embodiment of the invention plan view;

Fig. 2 is the A-A sectional view among Fig. 1 of the present invention;

Fig. 3 is the second embodiment of the invention plan view;

Fig. 4 is the B-B sectional view among Fig. 3 of the present invention.

Embodiment

As shown in Figure 1, 2, the present invention includes and comprise rigid backbone 2 and rope made of hemp layer 1, described rigid backbone 2 outer uniform winding rope made of hemp layers.The thickness of described rigid backbone 2 is 15mm.

Shown in Fig. 3,4, the thickness of described rigid backbone 2 is 0mm, does not promptly have rigid backbone 2.Use the rope made of hemp to be woven into the fiber crops circle.

The outer contour shape of described rope made of hemp layer 1 cross section is rectangle, circle or semicircle.

Cost reduction measuring and calculating (with nodular cast iron pipe DN300T type pipe is example, Data Source: Xinxing Cast Pipes Co., Ltd):

The sealing rubber ring price: 41.6 yuan/, rubber ring working life: 71/rubber rings,

The rope made of hemp: 13 yuan/Kg, the fiber crops circle: 8.9 yuan/(on average the 1Kg rope made of hemp weaves 2 fiber crops circles, 2.4 yuan of cost of labour), and fiber crops are enclosed working life: 188/numb circles,

Use rubber seal ton pipe cost: 41.6/ (71*0.323)=1.81 yuan/ton

Use a fiber crops circle ton pipe cost: 8.9/ (188*0.323)=0.15 yuan/ton

The ton tube coupling is about: 1.81-0.15=1.66 unit/ton

Indirect cost: 1. reduce and change the seal ring time, enhance productivity; 2. the cushion rubber collophore causes and throws off difficulty, influences rhythm of production; 3. the cushion rubber collophore falls pipe after throwing off easily, causes pipe to cheat outward, is judged to waste product.

Claims

1. seal ring, it is characterized in that: it comprises rigid backbone (2) and rope made of hemp layer (1), the outer rope made of hemp layer (1) that evenly is wound with of described rigid backbone (2).

2. seal ring according to claim 1 is characterized in that: the thickness of described rigid backbone (2) is 0-20mm.

3. seal ring according to claim 2 is characterized in that: the thickness of described rigid backbone (2) is 0mm, does not promptly have rigid backbone.

4. according to claim 1,2 or 3 described seal rings, it is characterized in that: the outer contour shape of described rope made of hemp layer (1) cross section is rectangle, circle or semicircle.