CN2753939Y

CN2753939Y - Clamping pipe fitting

Info

Publication number: CN2753939Y
Application number: CN 200420121933
Authority: CN
Inventors: 焦元武
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-31
Filing date: 2004-12-31
Publication date: 2006-01-25
Anticipated expiration: 2014-12-31

Abstract

The utility model relates to a clamping pipe fitting, which relates to a clamping pipe fitting used for the durable and reliable connection of pipelines. The clamping pipe fitting comprises a pipe fitting body and an O-shaped sealed ring. The pipe fitting body is provided with an end faucet at least whose end is provided with an annular inequilateral dovetail groove projecting outwards; the O-shaped sealed ring is arranged in the dovetail groove; the other side of the faucet is provided with a positioning step. The convex edge of the dovetail groove is almost parallel with the central line of the pipe fitting; the included angle between the inner side edge and the central line of the pipe fitting is 80 DEG to 90 DEG (90 DEG is optimal), and the included angle between the outer side edge which incline outwards and the central line of the pipe fitting is 50 DEG-75 DEG (which is 55 DEG at best). A connecting pipe is inserted into the faucet to the rear part of a position step; the dovetail groove of the faucet end and the clamping and pressing position of the inner side edge of the dovetail groove are simultaneously clamped and pressed by a special tool, so the connection of the pipeline can efficiently realized. The clamping pipe fitting has advantages of high connection strength, good sealing property, convenient installation, safety and reliability, and is applied to connections of various transport pipelines for low-voltage fluids.

Description

A kind of clamp-press type pipe

Technical field:

The utility model relates to a kind of permanent reliable clamp-press type pipe that connects of pipeline that is used for.

Background technique:

At present, clamp-press type pipe is progressively applied in pipe-line systems such as building water supply.As do not have stainless steel clamp-press type pipe, Shenzhen Ya Chang that Sillim sheep produces according to GB/T19228.1-2003 and produce two extruding type pipe fittings etc. according to company standard, all belong to the category of clamp-press type pipe.But these clamp-press type pipes, because be used to install the shaped design problem of the seal groove of O RunddichtringO, rounded as the seal groove chimb, the angle of inclination design of inner side edge and pipe fitting center line is smaller, usually (see Fig. 1 for details less than 60 °, Fig. 2), the following problem of all general appearance easily in work progress: because of the product machining tolerance, tube outer diameter may equate with O RunddichtringO internal diameter or be smaller, like this when tubing is inserted pipe fitting, cause the O RunddichtringO from seal groove, to skid off easily, and the O RunddichtringO stabbed or squeeze and hinder, thereby cause seal failure, pipe leakage makes that the connection of pipe-line system is unreliable.

The model utility content:

The purpose of this utility model is: avoid the O RunddichtringO slippage in the installation process as far as possible and stab, squeeze and to hinder phenomenon, provide a kind of construction more convenient, safer reliable clamp-press type pipe.

To achieve these goals, the utility model is by the following technical solutions:

A kind of clamp-press type pipe, it comprises pipe fitting body and RUBBER O RunddichtringO.The pipe fitting body has an end bell at least, and the outer ends of bellmouth along the circumferential direction has an outwards outstanding ring-type inequilateral dovetail groove, and the O RunddichtringO is packed in the dovetail groove, and the opposite side of bellmouth has the step of a location usefulness.Longitudinal section from clamp-press type pipe: the chimb of dovetail groove is almost parallel with pipe fitting body center line; Inner side edge becomes 80 ° of-90 ° of angles with pipe fitting body center line, preferably 90 °, vertical with pipe fitting body center line; Outer side is outward-dipping to become 50 ° of-75 ° of angles with pipe fitting body center line, preferably 55 °: outer side, chimb, inner side edge joint are fillet, and certain radian is arranged.Because it is almost vertical with pipe fitting body center line to be used to install the inner side edge of dovetail groove of O RunddichtringO, so when inserting tubing, even be subjected to radially thrust and the effect of frictional force, the O RunddichtringO does not still have the leeway of moving, thereby has prevented that effectively the O RunddichtringO from may stab or squeeze and hinder what the O RunddichtringO caused in slippage and the slippage process from dovetail groove.During construction and installation, to connect tubing inserts in the bellmouth to the positioning step position, press the position to block pressure simultaneously with special tool to the dovetail groove of bellmouth end and the card of dovetail groove inner side edge, after being squeezed, seal ring in the dovetail groove plays seal action, extrusion-deformation played the positioning and fixing effect when the inboard card of dovetail groove was pressed position tubing and pipe fitting, thereby had realized the connection of pipeline effectively.

A kind of clamp-press type pipe described in the utility model, can increase by one section socket joint body in the outside of dovetail groove, the O RunddichtringO is housed in the dovetail groove, the both sides of dovetail groove are joint socket, after tubing inserts pipe fitting, clamp-press type presses the position to block pressure simultaneously to the card of dovetail groove, dovetail groove both sides, thereby realizes that two card pressures connect.

A kind of clamp-press type pipe described in the utility model can be designed to Connecting format commonly used in the pipe-line system, as: butt joint, elbow, tee union, thread conversioning joint, nut crossover sub, flange crossover sub, pipe cap etc.

A kind of clamp-press type pipe described in the utility model can be made with stainless steel, carbon steel, copper or other metallic material.

The utility model join strength height, good seal performance, easy for installation, safe and reliable are applicable to the connection of the conveyance conduit of the various low-pressure fluids in a plurality of fields such as feedwater, draining, hot water, combustion gas, heating, medicine, oil, chemical industry.

Description of drawings:

Fig. 1 is no Sillim sheep clamp-press type pipe schematic representation (pressing GB/T19228.1-2003 production)

Fig. 2 is the two extruding type pipe fitting schematic representation of Shenzhen Ya Chang (by company standard production)

Fig. 3 is a clamp-press type pipe schematic representation described in the utility model

Fig. 4 is the longitudinal section that card is pressed back clamp-press type pipe, tubing

Fig. 5 is the schematic representation of described in the utility model pair of clamp-press type pipe.

Fig. 6 is several clamp-press type pipe form commonly used described in the utility model

Among the figure:

1-pipe fitting body 2-O RunddichtringO

3-connects tubing 4-bellmouth

5-dovetail groove 6-positioning step

The 7-card is pressed position 8-dovetail groove chimb

9-dovetail groove outer side 10-dovetail groove inner side edge

11-pipe fitting center line α-dovetail groove outer side and pipe fitting center line angle

β-dovetail groove inner side edge and pipe fitting center line angle

Embodiment:

The utility model will be further described below in conjunction with drawings and Examples:

Shown in Figure 3 is a kind of clamp-press type pipe of the present utility model.Clamp-press type pipe comprises pipe fitting body 1 and RUBBER O RunddichtringO 2.Pipe fitting body 1 has an end bell 4 at least, and the outer ends of bellmouth along the circumferential direction has an outwards outstanding ring-type inequilateral dovetail groove 5, and the O RunddichtringO is packed in the dovetail groove, and the opposite side of bellmouth has the step 6 of a location usefulness.Longitudinal section from clamp-press type pipe: the chimb 8 of dovetail groove is almost parallel with pipe fitting body center line 11; Inner side edge 10 becomes 80 ° of-90 ° of angle β with pipe fitting body center line, preferably 90 °, vertical with pipe fitting body center line; Outer side 9 is outward-dipping to become 50 ° of-75 ° of angle α, preferably 55 ° with pipe fitting body center line; Outer side, chimb, inner side edge joint are fillet, and certain radian is arranged.Because it is almost vertical with pipe fitting body center line to be used to install the inner side edge of dovetail groove of O RunddichtringO, so when inserting tubing, even be subjected to radially thrust and the effect of frictional force, the O RunddichtringO does not still have the leeway of moving, thereby has prevented that effectively the O RunddichtringO from may stab or squeeze and hinder what the O RunddichtringO caused in slippage and the slippage process from dovetail groove.During construction and installation, to connect tubing 3 inserts in the bellmouths to the positioning step position, press position 7 to block pressure simultaneously with special tool to the dovetail groove of bellmouth end and the card of dovetail groove inner side edge, after being squeezed, seal ring in the dovetail groove plays seal action, extrusion-deformation played the positioning and fixing effect when the inboard card of dovetail groove was pressed position tubing and pipe fitting, thereby had realized the connection of pipeline effectively.

Shown in Figure 4 is that a kind of clamp-press type pipe described in the utility model is being blocked the longitudinal section of pressing rear tubular member, tubing.The inequilateral dovetail groove is being subjected to the card pressure to become antiparallelogram substantially among the figure, and the angle of outer side and pipe fitting center line has become about 65 ° in the dovetail groove, and the O RunddichtringO is blocked compressive strain in the dovetail groove, makes sealing for tubing joints better like this, prevents seepage.

Shown in Figure 5 is the schematic representation of described in the utility model pair of clamp-press type pipe, its outside at dovetail groove increases by one section socket joint body, the O RunddichtringO is housed in the dovetail groove, the both sides of dovetail groove are joint socket, after tubing inserts pipe fitting, clamp-press type presses the position to block pressure simultaneously to the card of dovetail groove, dovetail groove both sides, thereby realizes that two clamp-press types connect.

Shown in Figure 6 is several clamp-press type pipe form commonly used described in the utility model, as: butt joint, elbow, tee union, thread conversioning joint, nut crossover sub, flange crossover sub, pipe cap etc.

Claims

1, a kind of clamp-press type pipe, comprise pipe fitting body and RUBBER O RunddichtringO, it is characterized in that: the pipe fitting body has an end bell at least, the outer ends of bellmouth along the circumferential direction has an outwards outstanding ring-type inequilateral dovetail groove, the O RunddichtringO is packed in the dovetail groove, and the opposite side of bellmouth has the step of a location usefulness.

2, clamp-press type pipe as claimed in claim 1, it is characterized in that: the dovetail groove of bellmouth end, its chimb is almost parallel with the pipe fitting center line, inner side edge becomes 80 °-90 ° (preferably 90 °) angles with the pipe fitting center line, outer side is outward-dipping to become 50 °-75 ° (preferably 55 °) angles with the pipe fitting center line, outer side, chimb, inner side edge joint are fillet, and certain radian is arranged.

3, clamp-press type pipe as claimed in claim 1, it is characterized in that: can increase by one section socket joint body in the outside of dovetail groove, the O RunddichtringO is housed in the dovetail groove, the both sides of dovetail groove are joint socket, after tubing inserts pipe fitting, clamp-press type presses the position to block pressure simultaneously to the card of dovetail groove, dovetail groove both sides, thereby realizes that two clamp-press types connect.

4, clamp-press type pipe as claimed in claim 1 is characterized in that: the pipe fitting body can design Connecting format commonly used, as: butt joint, elbow, tee union, thread conversioning joint, nut crossover sub, flange crossover sub, pipe cap etc.

5, clamp-press type pipe as claimed in claim 1 is characterized in that: the pipe fitting body can be made with stainless steel, carbon steel, copper or other metallic material.