CN2390087Y

CN2390087Y - Expansion pipe joint structure

Info

Publication number: CN2390087Y
Application number: CN 99248568
Authority: CN
Inventors: 李金锥
Original assignee: Huanqi Plastic Co ltd
Current assignee: Huanqi Plastic Co ltd
Priority date: 1999-10-20
Filing date: 1999-10-20
Publication date: 2000-08-02
Anticipated expiration: 2009-10-20

Abstract

The utility model relates to an expansion pipe joint structure which is mainly composed of an inner body, an outer body, a rotating ring, a clamping ring and two leakproof rings, wherein, the inner body is a hollow barrel body, the front end of the inner body is provided with a fixed disk, and a lateral margin of a tail end is provided with ring grooves for plugging the two leakproof rings. The outer body is also a hollow barrel body, the tail end is provided with the fixed disk, and the periphery of the front end is provided with outer screw threads. The rotating ring which is sheathed on the inner body can be screwed on the outer body through the outer screw threads. When the rotating ring is tightly screwed with the outer body, the inner body which is plugged at the inner margin of the outer body is pressed, and forms a state of smoothing moving without falling off.

Description

The pipe expansion joint structure

The delivery pipe that generally is used at present conveyance fluid, no matter the life-span or properly rate all can't reach requirement, and can't effectively be grasped, but the apportion of tracing it to its cause is as follows:

1. the fluid temperature variations in the delivery pipe is excessive, causes the delivery pipe number of times that expands with heat and contract with cold too much, and then influences the life-span of delivery pipe.

2. the temperature temperature variation outside the delivery pipe pipe is acute excessively, and the delivery pipe internal and external temperature is differed, and causes differed and bending deflection by temperature inside and outside the delivery pipe.

3. vertical delivery pipe only is subjected to small temperature variation and collapses, its variation in the whole total length of delivery pipe also is considerable, and because delivery pipe is all adopted the means of fixation setting, produce deformational displacement for delivery pipe nowhere, therefore delivery pipe is under long deformation pressure, and it distorts even break and all can avoid.

The purpose of this utility model is: the problem that exists at the present delivery pipe of general conveyance fluid provides a kind of pipe expansion joint structure, its conveying that can apply to various fluids is used, and, and make delivery pipe that deformed damaged be arranged not because of the variation of fluid temperature (F.T.) or external temperature.

Pipe expansion joint structure described in the utility model, mainly by an interior body, one outer body, one change, one snap ring and two seal rings are formed, wherein interior body is that a front end is provided with the hollow cylinder that sets firmly dish, and its tail end lateral margin place is provided with the annular groove of establishing for the leak-stopping ring taps, also be shaped on chute on the interior body, outer body also is that a tail end is provided with the hollow cylinder that sets firmly dish, its front periphery then is provided with an outside thread, see through this externally threaded setting, make the change that is sheathed on the interior body can be fixed on the outer body, and when change and outer body screw, the snap ring effect of body outer rim in engage sleeves is located at, its outer body only can smoothly be moved in the chute on the interior body and can't come off, when delivery line when expanding with heat and contract with cold, body and outer body can produce relative displacement in it, avoid delivery line to produce torsional deformation because of expanding with heat and contract with cold.

The effect of model utility and effect:

The utlity model has following advantage:

1. when pipe expansion joint of the present utility model is installed on the general delivery pipe, can prevent that its delivery pipe is out of shape because of variation of temperature.

2. see through the life-span that enforcement of the present utility model can significantly promote delivery pipe.

3. setter can be adjusted the length of this pipe expansion joint in advance according to the fluid temperature (F.T.) in its delivery pipe.

4. installation of the present utility model is simply easy, and can avoid escape of liquid through the setting of seal ring.

5. this pipe expansion joint uses applicable to the conveying of various fluids.

Fig. 1 is the three-dimensional exploded view of the utility model pipe expansion joint structure;

Fig. 2 is a three-dimensional view of the present utility model;

Fig. 3 is a sectional view of the present utility model;

Fig. 4 is an enforcement illustration of the present utility model.

The figure number explanation:

Body in 1 pipe expansion joint 11

111 set firmly dish 112 lockholes

113 chutes, 114 annular grooves

12 outer bodies 121 set firmly dish

122 outside threads, 123 graduation lines

13 changes, 131 internal threads

14 seal rings, 15 snap rings

2 fixing bolts, 3 delivery pipes

Below in conjunction with embodiment shown in the drawings, describe structure of the present utility model, function and feature in detail:

Shown in Figure 1 is isometric exploded view of the present utility model, disclose the structure of a kind of pipe expansion joint 1 of the present utility model among the figure, it is mainly by an interior body 11, one outer body 12, one change 13, one snap ring 15 and two seal rings 14, wherein interior body 11 is that a front end is provided with one and sets firmly dish 111 hollow cylinder, this sets firmly dish 111 and is provided with some lockholes 112 for fixing bolt 2 lockings, the tail end lateral margin place of interior again body 11 then is provided with two annular grooves 114 that supply circular seal ring 14 plugs to establish, visual its of this seal ring and annular groove need increase and decrease quantity, as for outer body 12 also is that a tail end is provided with the hollow cylinder that sets firmly dish 121, its front periphery is provided with an outside thread 122, and the setting that sees through this outside thread 122 can make the change 13 that is sheathed on the interior body can be fixed on the outer body 12, as for snap ring 15, it is a stepped moulding, the outer rim of body 11 in it is sheathed on, with blocking change 13 itself and interior body 15 are broken away from, when change 13 and snap ring 15 cooperatively interact and do the time spent, outer body 12 is combined with interior body 11 and prevent to come off (please consulting Fig. 2 simultaneously).

Shown in Figure 3 is sectional view of the present utility model, body 11 is that plug is located among the outer body 12 in disclosing among the figure, and the internal thread 131 that sees through change 13 inner edges is provided with, can be arranged in mutually together with the outside thread 122 of outer body 12 leading edges, cooperate the setting of snap ring 15 that its outer body 12 only can be come off mutually in chute 113 translation slips on the interior body 11 are unlikely, when being subjected to powerful external force, pipe expansion joint 1 does the time spent, its outer body 12 promptly can produce the relative displacement campaign with interior body 11, dissolving aforesaid external force, and this external force refers to that promptly fluid delivery tube 3 is subjected to the vertical contraction of deformation that temperature change produces or the stress of stretching.

Figure 4 shows that the enforcement illustration when the utility model is used, disclose when fluid delivery tube 3 expanded by heating or shrinkage among the figure, the length change that delivery pipe 3 vertical faces are produced, promptly can cause distortion and the distortion and then the damaged fracture of this delivery pipe 3, but the outer body 12 that sees through this pipe expansion joint 1 is implemented with interior body 11 effects, the longitudinal deformation that produces because of temperature variation when delivery pipe 3 can be by the relative movement of 11 of outer body 12 and interior bodies and dissolve; Moreover the longitudinal length that delivery pipe 3 is produced by temperature variation increases, subtracts, prediction and calculation goes out an about value in advance, use the original relative position of adjusting its outer body 12 and interior body 11, and the length adjustment after calculating can accurately be grasped by the graduation line 123 that collapses on the interior body 11.

Claims

1. pipe expansion joint structure, comprise body, an outer body, a change, a snap ring and seal ring in one, it is characterized in that: interior body is that a front end is provided with a hollow cylinder that sets firmly dish, and its tail end lateral margin place then is provided with the annular groove of establishing for the leak-stopping ring taps, also is shaped on chute on the interior body; Outer body also is that a tail end is provided with the hollow cylinder that sets firmly dish, its front periphery then is provided with an outside thread, when outer body and interior body be nested fashionable, see through the setting of change and snap ring, can establish with the mutual spiral shell of the outside thread on the outer body, and make its outer body with only can be in the chute translation slip on the interior body.

2. by the described pipe expansion joint structure of claim 1, it is characterized in that: wherein seal ring can be one or a plurality of.

3. by the described pipe expansion joint structure of claim 1, it is characterized in that: wherein annular groove can be one or a plurality of.