CN104061382A

CN104061382A - Connector sealing structure of T-shaped ductile iron pipe

Info

Publication number: CN104061382A
Application number: CN201410253310.4A
Authority: CN
Inventors: 贾元奎; 王海; 崔胜凯; 林鹏; 刘小亮
Original assignee: SHANDONG NODULAR CAST IRON PIPE CO Ltd
Current assignee: SHANDONG NODULAR CAST IRON PIPE CO Ltd
Priority date: 2014-06-10
Filing date: 2014-06-10
Publication date: 2014-09-24

Abstract

The invention discloses a connector sealing structure of a T-shaped ductile iron pipe. The connector sealing structure comprises a ductile iron pipe insertion opening, a ductile iron pipe connector and a gasket ring, wherein a ring-shaped groove is formed in the inner surface of the ductile iron pipe connector; the gasket ring is embedded in the groove and the thickness of the gasket ring is greater than the depth of the groove; the contact face between the gasket ring in a pipe and the water is a V-shaped concave surface. The connector sealing structure of the T-shaped ductile iron pipe has a simple structure, is convenient to mount and good in sealing effect, and effectively solves the problem that the leakage of the ductile iron pipe is caused when the water pressure is higher.

Description

A kind of interface sealing structure of T-shaped ductile iron pipe

Technical field

The present invention relates to a kind of interface sealing structure of T-shaped ductile iron pipe.

Background technique

The domestic ductile iron pipe for water delivery is mainly the T-shaped ductile iron pipe of producing by GB/T13295, and the ductile iron pipe for water delivery of outlet is mainly also the T-shaped ductile iron pipe of producing by ISO2531.This T-shaped spheroidal graphite cast iron interface tube is to utilize the self sealing action of cushion rubber to keep sealing joint, because the cushion rubber of used T-shaped structure is arc convex surface with the surface of contact of the interior water of pipe, sealing effect is poor, especially in the time that inner pipe water pressure improves, easily there is seepage, cause the loss of water and water to pollute.

The mode of existing improvement sealing effect is that bellmouth inner-cavity structure and the cushion rubber to T-shaped ductile iron pipe carried out changing or increasing additional attachments simultaneously, be unfavorable for ductile iron pipe standardized production and installation, in the time of follow-up pipe-line maintenance maintenance, the ductile iron pipe higher to cost do not have interchangeability.

Summary of the invention

The technical problem to be solved in the present invention is: the interface sealing structure of T-shaped ductile iron pipe that a kind of not easy to leak is provided and for ease of maintenaince safeguards.

In order to solve the problems of the technologies described above, the present invention includes ductile iron pipe socket, ductile iron pipe birdsmouth, O-ring seal, the internal surface of ductile iron pipe birdsmouth has annular groove, O-ring seal is inlaid in groove and its thickness is greater than the degree of depth of groove, and described O-ring seal is V-type concave surface with the surface of contact of water in pipeline.

For the ease of installation and the sealing of O-ring seal, the outer surface of described O-ring seal has the convex surface of annular groove or annular, has the groove or the convex surface that match with groove or convex surface on the internal surface of described ductile iron pipe birdsmouth.

Insert ductile iron pipe birdsmouth for the ease of ductile iron pipe socket, the internal surface of the opposite side relative with V-type concave surface of described O-ring seal has annular fillet or annular the 3rd chamfering.

For convenient for maintaining and installation, the outer surface of described graphite cast iron pipe socket is the first chamfering of annular, and the internal surface of described spheroidal graphite cast iron tube faucet is the second chamfering of annular.

Beneficial effect of the present invention: the thickness of O-ring seal is greater than the degree of depth of groove, can make O-ring seal tightly overstock and between ductile iron pipe socket and ductile iron pipe birdsmouth, play good self-packing effect, V-type cushion rubber is V-type concave surface with the surface of contact of water in pipeline simultaneously, the pressure that this structure takes full advantage of water self carrys out enhanced leaktightness effect, hydraulic pressure is larger simultaneously, make the pressure on V-type cushion rubber and spheroidal graphite cast iron tube faucet inwall and ductile iron pipe socket outer wall larger, sealing effect is better, play the well effect from close property, thereby solve the problem that spheroidal graphite cast iron iron pipe seeps water in the time that hydraulic pressure is higher.Simultaneously this simple in structure, easily fitting operation, is easy to convenient for maintaining and maintenance.

Brief description of the drawings

Fig. 1 is the semi-section schematic diagram of the specific embodiment of the invention one;

Fig. 2 is the semi-section schematic diagram of the specific embodiment of the invention two;

In figure: 1, ductile iron pipe socket; 2, ductile iron pipe birdsmouth; 3-1, groove; 3-2, convex surface; 4, O-ring seal; 5, V-type concave surface; 6, groove; 7, the second chamfering; 8-1, fillet; 8-2, the 3rd chamfering 9, the first chamfering.

Embodiment

specific embodiment one

The interface sealing structure of a kind of T-shaped ductile iron pipe as shown in Figure 1, comprise ductile iron pipe socket 1, ductile iron pipe birdsmouth 2, O-ring seal 4, the internal surface of ductile iron pipe birdsmouth 2 has annular groove 6, O-ring seal 4 is inlaid in groove 6 and its thickness is greater than the degree of depth of groove 6, and described O-ring seal 4 is V-type concave surface 5 with the surface of contact of water in pipeline.

The outer surface of O-ring seal has the groove 3-1 of annular U font, together with V-type cushion rubber closely cooperates by groove 3-1 with the groove of ductile iron pipe birdsmouth.By O-ring seal setting-in after groove.In order to facilitate fitting operation, the internal surface of the opposite side relative with V-type concave surface 5 of O-ring seal 4 is had to annular fillet 8-1, the outer surface of graphite cast iron pipe socket 1 being manufactured to the first chamfering 9 of annular, is the second chamfering 7 of annular by the internal surface of spheroidal graphite cast iron tube faucet 2.

When ductile iron pipe socket 1 inserts ductile iron pipe birdsmouth 2 when interior, the thickness of O-ring seal 4 is greater than the degree of depth of groove 3-1, and the surface of contact that can make like this O-ring seal 4 tightly overstock O-ring seal 4 water in pipeline described in the while between ductile iron pipe socket 1 and ductile iron pipe birdsmouth 2 is V-type concave surface 6.In the time that the pressure of water is strengthened the pressure of water by V-type concave surface 6 act on V-type cushion rubber 5, make simultaneously the inwall of V-type cushion rubber and spheroidal graphite cast iron tube faucet 2 and the outer wall pressure of ductile iron pipe socket 1 larger, sealing effect is also just better, thereby has prevented the seepage of moisture in the time of high pressure.

specific embodiment two

as shown in Figure 2, this specific embodiment two is the stepped convex surface 3-2 that the groove 3-1 of the U font of V-type cushion rubber 4 outer surfaces changed into annular on the basis of specific embodiment one, and the internal surface of the groove 6 of ductile iron pipe birdsmouth 2 has the groove matching with stepped convex surface 3-2.

Claims

1. the interface sealing structure of a T-shaped ductile iron pipe, it is characterized in that: comprise ductile iron pipe socket (1), ductile iron pipe birdsmouth (2), O-ring seal (4), the internal surface of ductile iron pipe birdsmouth (2) has annular groove (6), O-ring seal (4) is inlaid in groove (6) and its thickness is greater than the degree of depth of groove (6), and described O-ring seal (4) is V-type concave surface (5) with the surface of contact of water in pipeline.

2. the interface sealing structure of T-shaped ductile iron pipe according to claim 1, it is characterized in that: the outer surface of described O-ring seal (4) has the convex surface (3-2) of annular groove (3-1) or annular, has the groove or the convex surface that match with groove (3-1) or convex surface (3-2) on the internal surface of described ductile iron pipe birdsmouth (2).

3. the interface sealing structure of T-shaped ductile iron pipe according to claim 1, is characterized in that: the internal surface of the opposite side relative with V-type concave surface (5) of described O-ring seal (4) has annular fillet (8-1) or annular the 3rd chamfering (8-2).

4. the interface sealing structure of T type ductile iron pipe according to claim 1, it is characterized in that: the outer surface of described graphite cast iron pipe socket (1) is first chamfering (9) of annular, the internal surface of described spheroidal graphite cast iron tube faucet (2) is second chamfering (7) of annular.