CN203656402U

CN203656402U - Pipe coupling

Info

Publication number: CN203656402U
Application number: CN201420027159.8U
Authority: CN
Inventors: 杨恩明
Original assignee: Taizhou Plain Bright Sharp Valve Pipe Fitting Co Ltd
Current assignee: Taizhou Plain Bright Sharp Valve Pipe Fitting Co Ltd
Priority date: 2014-01-16
Filing date: 2014-01-16
Publication date: 2014-06-18
Anticipated expiration: 2024-01-16

Abstract

The utility model discloses a pipe coupling. The internal wall of the pipe coupling is formed by a first annular step, a second annular step and a third annular step; the internal diameter of the first annular step, the second annular step and the third annular step is sequentially reduced; a metal gasket and an elastic metal clamping ring are sleeved inside the first annular step sequentially; the external diameter of the metal gasket and the elastic metal clamping ring is matched with the internal diameter of the first annular step; the internal diameter of the metal gasket and the elastic clamping is matched with the internal diameter of the second annular step; an O-shaped sealing ring is arranged between the metal gasket and the bottom of the first annular step; the internal diameter of the O-shaped sealing ring is slightly less than the internal diameter of the second annular step; one end of the elastic metal clamping ring, which is opposite to the metal gasket, is provided with a conical surface; the internal wall of a pressure cover pipe is provided with an inclined surface which is matched with the conical surface; an annular groove is formed at the bottom of the second annular step; an annular sealing ring is embedded inside the annular groove; the external surface at one end of the annular sealing ring is an arc surface; a surface of the annular sealing ring, which is relative to the internal wall of the second annular step, is inwardly concaves to form into an empty chamber. The pipe coupling is strong in sealing performance.

Description

Pipe fitting joint

Technical field

The utility model relates to a kind of pipe joint, and more particularly, it relates to a kind of pipe fitting joint.

Background technique

Pipe fitting joint is a kind of pipe joint, is generally usually used in the connection between the pipeline of city domestic water, or for the connection between industrial pipeline.

At present; pipe fitting joint sealability deficiency on market; the joint of pipe fitting joint often can find that there is seepage; not only waste resource; also cause serious economic loss; if the pipe fitting joint generation seepage on chemical pipeline can cause environmental pollution, the event that serious also can causing is poisoning, blast etc. jeopardizes personal safety as well as the property safety occurs.

Model utility content

The deficiency existing for prior art, the purpose of this utility model is to provide a kind of pipe fitting joint with stronger sealability.

For achieving the above object, the utility model provides following technological scheme: a kind of pipe fitting joint, comprise adaptor tube, gland pipe, described gland pipe box is on adaptor tube, gland pipe and adaptor tube are threaded connection, described adaptor tube inwall is step-like, the first ring-shaped step being reduced successively by internal diameter, the second ring-shaped step and the 3rd ring-shaped step composition, in the first described ring-shaped step, be arranged with successively metallic shim and elastic metallic collar, the external diameter of described metallic shim and elastic metallic collar and the first ring-shaped step internal diameter are suitable, the internal diameter of described metallic shim and elastic metallic collar and the second ring-shaped step internal diameter are suitable, between described metallic shim and the first ring-shaped step bottom, be provided with O-ring seals, the internal diameter of described O-ring seals is slightly less than the internal diameter of the second ring-shaped step, the other end of the described relative metallic shim of elastic metallic collar is provided with the conical surface, described gland inner tube wall is provided with the inclined-plane suitable with the conical surface, in the second described ring-shaped step, be provided with O-ring seal, the second ring-shaped step bottom is provided with annular groove, described O-ring seal one end is stuck in annular groove, the other end outer surface is arc surface, the surface of relative the second ring-shaped step inwall of O-ring seal caves inward and forms cavity.

The utility model is further set to: described ring packing ring cross-section is substantially c-shaped.

The utility model is further set to: described elastic metallic collar inwall and the angle of the conical surface are 45 °.

The utility model is further set to: on the outer ring of described adaptor tube and gland pipe, be equipped with some stiffening ribs, described stiffening rib is circularly and evenly distributed.

By adopting technique scheme, this pipe fitting joint is by rotary gland pipe, due to the cooperation of inclined-plane and the conical surface, make elastic metallic collar there is inside pressuring action, clamp more closely built-in pipeline, also can push O-ring seals, O-ring seals is pushed to the inside, play better seal action simultaneously; And built-in pipeline is to the O-ring seal extruding of the second ring-shaped step, the cavity that O-ring seal and the second ring-shaped step inwall form can play buffering regulating action, the arc surface of O-ring seal can be fitted on the pipeline being connected closely, play the effect of the second resealing, effectively raise overall sealing performance, avoid pipe fitting joint to occur the phenomenon of seepage.

Accompanying drawing explanation

Fig. 1 is the utility model pipe fitting joint embodiment's sectional view;

The partial enlarged drawing of A in Fig. 2 Fig. 1.

Reference character: 1, adaptor tube; 11, the first ring-shaped step; 12, the second ring-shaped step; 121, annular groove; 13, the 3rd ring-shaped step; 2, gland pipe; 21, inclined-plane; 3, metallic shim; 4, elastic metallic collar; 41, the conical surface; 5, O-ring seals; 6, O-ring seal; 61, arc surface; 7, cavity; 8, stiffening rib.

Embodiment

Referring to figs. 1 through Fig. 2, the utility model pipe fitting joint embodiment is described further.

A kind of pipe fitting joint, comprise adaptor tube 1, gland pipe 2, described gland pipe 2 is enclosed within on adaptor tube 1, gland pipe 2 is threaded connection with adaptor tube 1, described adaptor tube 1 inwall is step-like, the first ring-shaped step 11 being reduced successively by internal diameter, the second ring-shaped step 12 and the 3rd ring-shaped step 13 form, in the first described ring-shaped step 11, be arranged with successively metallic shim 3 and elastic metallic collar 4, described metallic shim 3 and the external diameter of elastic metallic collar 4 and the first ring-shaped step 11 internal diameters are suitable, described metallic shim 3 and the internal diameter of elastic metallic collar 4 and the second ring-shaped step 12 internal diameters are suitable, between described metallic shim 3 and the first ring-shaped step 11 bottoms, be provided with O-ring seals 5, the internal diameter of described O-ring seals 5 is slightly less than the internal diameter of the second ring-shaped step 12, the other end of described elastic metallic collar 4 relative metallic shims 3 is provided with the conical surface 41, described gland pipe 2 inwalls are provided with the inclined-plane 21 suitable with the conical surface 41, in the second described ring-shaped step 12, be provided with O-ring seal 6, the second ring-shaped step 12 bottoms are provided with annular groove 121, described O-ring seal 6 one end are stuck in annular groove 121, the other end outer surface is arc surface 61, the surface of relative the second ring-shaped step 12 inwalls of O-ring seal 6 caves inward and forms cavity 7, described O-ring seal 6 cross sections are substantially c-shaped.Wherein, elastic metallic collar 4 is the metal ring with otch, described elastic metallic collar 4 inwalls are provided with anti-skidding striped, can improve the stability of connection, do further guarantee for improving sealing, this pipe fitting joint is in the time of connecting tube, pipeline is inserted from gland pipe 2 one end, and rotary gland pipe 2, due to the cooperation of inclined-plane 21 and the conical surface 41, make elastic metallic collar 4 there is inside pressuring action, make elastic metallic collar 4 can block more closely built-in pipeline, also can push O-ring seals 5 simultaneously, O-ring seals 5 is pushed to the inside, being attached on pipeline tightly, play better seal action, and built-in pipeline pushes to the O-ring seal 6 of the second ring-shaped step 12, the cavity 7 that O-ring seal 6 and the second ring-shaped step 12 inwalls form can play buffering regulating action, O-ring seal 6 is curved inwardly, and the arc surface 61 of O-ring seal 6 can be fitted on the pipeline being connected closely, play the effect of the second resealing, effectively raise overall sealing performance, avoid pipe fitting joint to occur the phenomenon of seepage.

Described elastic metallic collar 4 inwalls and the angle of the conical surface 41 are 45 °, the power of using when this angle can be saved rotary gland pipe 2.

On described adaptor tube 1 and the outer ring of gland pipe 2, be equipped with some stiffening ribs 8, described stiffening rib 8 is circularly and evenly distributed.Stiffening rib 8 can improve the intensity of adaptor tube 1 and gland pipe 2.

Claims

1. a pipe fitting joint, comprise adaptor tube, gland pipe, described gland pipe box is on adaptor tube, gland pipe and adaptor tube are threaded connection, it is characterized in that: described adaptor tube inwall is step-like, the first ring-shaped step being reduced successively by internal diameter, the second ring-shaped step and the 3rd ring-shaped step composition, in the first described ring-shaped step, be arranged with successively metallic shim and elastic metallic collar, the external diameter of described metallic shim and elastic metallic collar and the first ring-shaped step internal diameter are suitable, the internal diameter of described metallic shim and elastic metallic collar and the second ring-shaped step internal diameter are suitable, between described metallic shim and the first ring-shaped step bottom, be provided with O-ring seals, the internal diameter of described O-ring seals is slightly less than the internal diameter of the second ring-shaped step, the other end of the described relative metallic shim of elastic metallic collar is provided with the conical surface, described gland inner tube wall is provided with the inclined-plane suitable with the conical surface, in the second described ring-shaped step, be provided with O-ring seal, the second ring-shaped step bottom is provided with annular groove, described O-ring seal one end is stuck in annular groove, the other end outer surface is arc surface, the surface of relative the second ring-shaped step inwall of O-ring seal caves inward and forms cavity.

2. pipe fitting joint according to claim 1, is characterized in that: described elastic metallic collar inwall is provided with anti-skidding striped.

3. pipe fitting joint according to claim 1 and 2, is characterized in that: described elastic metallic collar inwall and the angle of the conical surface are 45 °.

4. pipe fitting joint according to claim 3, is characterized in that: described ring packing ring cross-section is substantially c-shaped.

5. pipe fitting joint according to claim 4, is characterized in that: on the outer ring of described adaptor tube and gland pipe, be equipped with some stiffening ribs, described stiffening rib is circularly and evenly distributed.