CN2220001Y

CN2220001Y - Steel wire clamping quick-acting pipe connection

Info

Publication number: CN2220001Y
Application number: CN 95208445
Authority: CN
Inventors: 唐程辉; 陈德信
Original assignee: YUANLIAO INDUSTRIAL DEVELOPMENT Co BEIJING
Current assignee: YUANLIAO INDUSTRIAL DEVELOPMENT Co BEIJING
Priority date: 1995-04-12
Filing date: 1995-04-12
Publication date: 1996-02-14
Anticipated expiration: 2005-04-12

Abstract

The utility model relates to a steel wire clamping quick-acting pipe connection which comprises a connection body, a back cap and a rubber ring, wherein, the outer circle faces of the end parts of the connection body are respectively provided with a section of external thread, and the inner circle faces are provided with concave shoulders near the end parts. One end of the inner circle face of the back cap is provided with a section of internal thread that matches with the external thread of the connection body. The rubber sealing ring is arranged in the back cap. The utility model is characterized in that the other end of the inner circle face of the back cap is provided with a conical surface that is contracted gradually toward the end face of the end. The pipe connection also comprises an open wire loop which is arranged at the postion near the conical surface in the back cap and bunted with the other end of the sealing ring.

Description

The quick pipe joint of wire clip compact form

The utility model relates to a kind of pipe joint, be particularly related to the pipe joint that pipelines such as a kind of water pipe, heating pipe, gas pipe connect usefulness, relate in particular to that a kind of connected pipe fitting need not on-the-spot hitch and the pipe joint that can connect fast and have higher join strength, rigidity and sealability.

Common pipeline connects, and normally adopts hitch, welding or gluing method such as connect at the scene.The connecting means of the on-the-spot hitch of the most frequently used employing is not only wasted time and energy, and construction and installation are inconvenience very, and poor because of sealing effect, often has the seepage phenomenon to take place.For this reason, those skilled in the art once proposed a kind of fast-connection pipeline, for example, CN2129361Y has proposed a kind of practical quick coupling, and this pipe joint comprises one group of locking nut, stuffing box gland and assemblying body, during installation, stuffing box gland places and is enclosed within together in the locking nut on the not threaded pipe fitting, and pipe fitting is by being arranged on the concave station shoulder assemblying body at assembly parts through hole two ends, tighten locking nut and make the stuffing box gland compressive deformation, play the part of sealing and fixed fitting and use.But, pipe fitting only depend on behind the stuffing box gland compressive deformation and the frictional force between pipe fitting pipe fitting is affixed, counter-bending ability, join strength is not high, for the connection of large sized fittings or when using under elevated pressures, connected pipe fitting is transferred to from pipe joint easily.

For this reason, the purpose of this utility model is to propose a kind of simple in structure, join strength and rigidity height, good seal performance, pipe joint with low cost and quick for installation.

For achieving the above object, the utility model proposes the quick pipe joint of a kind of wire clip compact form, this pipe joint comprises: have fittings body, back of the body cap, the rubber ring of through hole, have one section outside thread on the outer circumferential face of the end of described fittings body respectively, inner peripheral surface has the concave station shoulder near the place, end; Described back of the body cap is the form of locking nut, and an end of inner circumferential surface has one section internal thread that matches with outside thread on the fittings body; Described rubber seal is arranged within the back of the body cap, one end is against the end face of fittings body, it is characterized in that, the other end of the inner peripheral surface of described back of the body cap has towards the conical surface of this end end face convergent, described pipe joint also comprises an opening steel traveler, it is arranged within the back of the body cap near the position of conical surface, and leans with the other end of seal ring.

Wherein, the inner peripheral surface of described opening steel traveler is smooth.

Wherein, the inner peripheral surface of described opening steel traveler is the band internal tooth.

Wherein, described fittings body can be lead directly to, threeway, elbow or four-way.

Wherein, the cone angle of the internal conical surface of described back of the body cap is 24 °-60 °.

The quick pipe joint of wire clip compact form that the utility model proposes, simple in structure have advantages such as join strength and rigidity height, favorable sealing property, need not on-the-spot hitch just can realize installing efficiently, accelerated construction speed greatly, reduced cost, be suitable for the pipeline of various sizes and the pipeline connection that pressure uses down, safe and reliable.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is the installment state structural representation of the quick pipe joint of wire clip compact form that the utility model proposes.

Fig. 2 is the enlarged view of the local B among Fig. 1, the original state when the expression pipe joint is connected with pipe fitting.

Fig. 3 is and the similar view of Fig. 2 the working state after representing pipe joint and pipe fitting being connected.

Fig. 4 is the schematic representation of opening steel traveler.

Fig. 5 is the schematic representation of the opening steel traveler of band internal tooth.

As shown in Figure 1, the quick pipe joint of wire clip compact form that the utility model proposes comprises: fittings body 1, the back of the body cap 2, rubber seal 3 and opening steel traveler 4 with through hole.Have one section outside thread 11 on the outer circumferential face of the end of described fittings body 1 respectively, the inner peripheral surface of fittings body 1 has concave station shoulder 12 near end place, this fittings body can be lead directly to, elbow, threeway, four-way various ways such as (containing modification and reducing).Described back of the body cap 2 is the form of locking nut, one end of inner circumferential surface has one section internal thread 21 that matches with outside thread 11 on the fittings body 1, the other end has the conical surface 22 towards this end face convergent, and this conical surface 22 becomes the α angle with the center line of back of the body cap, as shown in Figure 2.Described rubber seal 3 is arranged on the position of the inboard of back of the body cap 2 near internal thread 21, and the one end is against the end face of fittings body 1, and the other end is against opening steel traveler 4.Described opening steel traveler 4 is arranged on the position of the inboard of back of the body cap 2 near conical surface 22.Opening steel traveler shown in Figure 4 is applicable to the connection of small size pipeline.The opening steel traveler that has internal tooth shown in Figure 5 is applicable to the connection of large scale pipeline.

During installation, connected pipe fitting 5 axially is inserted in the back of the body cap 2, passes opening steel traveler 4, seal ring 3, and match with concave station shoulder 12 on the fittings body 1, tighten back of the body cap 2 by spanner, back of the body cap 2 is made n, s to motion, makes the outside thread bridle joint mutually of internal thread 21 and the fittings body 1 of back of the body cap 2.Simultaneously, under the effect of the conical surface 22 of carrying on the back cap 2, as shown in Figure 3, steel traveler is by the radial component P1 of positive pressure P, and radially be pressed on the connected tube 5, and axially oppressing steel traveler, horizontal component P2 is close to seal ring 4, that is to say, seal ring 3 is compressed, one end-face A is tightly against the end face of fittings body 1, the conical surface 22 of the other end and opening steel traveler 4 and back of the body cap 2 closely cooperates, its inner circumference closely cooperates with coupled pipe fitting 5 again, has played the effect of sealing and connection pipe fitting 5, and 4 of opening steel traveler are under the effect of the conical surface 22 of back of the body cap 2, closing any opening C and block connected pipe fitting 5 has tightly increased the rigidity and the intensity that connect.Adopt the opening steel traveler of band internal tooth as shown in Figure 5, can strengthen clamping force pipe fitting 5.

Test shows, connects 1 " during (contain 1 ") following pipe fitting, use the opening steel coil of no internal tooth, can guarantee join strength and sealability under the pressure medium below the 6MPa.Connect 1 " to 3 " pipe fitting the time, use the opening steel traveler of band internal tooth, can satisfy join strength and sealability under the pressure medium of 6MPa.The conical surface 22 of back of the body cap 2 should be in 12 ° of-30 ° of scopes with the oblique angle α of center line, and (cone angle that is conical surface is 24 °-60 °), little caliber is got big value, and big caliber gets the small value.The diameter of opening steel traveler is in φ 1-3 scope, and it increases along with the increase of caliber.Girth calculates according to the lower deviation of the NBS of the product of connecting tube 5 and determines in the opening steel traveler, and the opening degree C of opening steel traveler calculates according to the upper deviation of the NBS of the product of connecting tube 5 and determines.

Claims

1, the quick pipe joint of a kind of wire clip compact form, this pipe joint comprises: have fittings body, back of the body cap, the rubber ring of through hole, have one section outside thread on the outer circumferential face of the end of described fittings body respectively, inner peripheral surface has the concave station shoulder near the place, end; Described back of the body cap is the form of locking nut, and an end of inner circumferential surface has one section internal thread that matches with outside thread on the fittings body; Described rubber seal is arranged within the back of the body cap, one end is against the end face of fittings body, it is characterized in that, the other end of the inner peripheral surface of described back of the body cap has towards the conical surface of this end end face convergent, described pipe joint also comprises an opening steel traveler, it is arranged within the back of the body cap near the position of conical surface, and leans with the other end of seal ring.

2, pipe joint as claimed in claim 1 is characterized in that, wherein, the inner peripheral surface of described opening steel traveler is smooth.

3, pipe joint as claimed in claim 1 is characterized in that, wherein, the inner peripheral surface of described opening steel traveler is to be with internal tooth.

4, pipe joint as claimed in claim 1 is characterized in that, wherein, described fittings body can be lead directly to, threeway, elbow or four-way.

5, pipe joint as claimed in claim 1 is characterized in that, wherein, the cone angle of the internal conical surface of described back of the body cap is 24 °-60 °.