CN204647703U - Pressure balance type compensating joint - Google Patents

Abstract

The utility model discloses a kind of pressure balance type compensating joint, it comprises connecting tube and telescopic pipe, the extension sleeve that telescopic pipe comprises telescopic pipe body and is arranged on telescopic pipe body, on telescopic pipe body, contiguous extension sleeve place is provided with pressure balance sleeve, one end of pressure balance sleeve is sealingly fastened on the telescopic pipe body of telescopic pipe, its the other end is sealingly fastened on the extension sleeve of telescopic pipe, and pressure balance sleeve coordinates the extension sleeve of telescopic pipe to be formed with a cavity volume, the telescopic pipe body of telescopic pipe has water port, and be connected with described cavity volume by this water port, the diameter of pressure balance sleeve wherein, d is the telescopic pipe body diameter of telescopic pipe.The utility model is by setting up pressure balance sleeve in the outside of telescopic pipe, extension sleeve is coordinated to form a cavity volume, and offer water port this cavity volume is connected with telescopic pipe, and then make cavity volume consistent with the pressure medium in telescopic pipe, thus balance the thrust that media interior pressure produces.

Description

Pressure balance type compensating joint

Technical field

The utility model relates to a kind of compensating joint, particularly relates to a kind of pressure balance type compensating joint.

Background technique

At present; various pipe-line system is such as: gas pipe line; water supply line; oil transport pipelines etc. are widely used in daily life; and in the process of deployment of various pipe-line system; in order to compensate because expanding with heat and contract with cold and axial displacement that the sedimentation of ground causes and radial flexure, usually can compensating joint be set.But, existing compensating joint, itself cannot bear the blind flange force that in medium, pressure produces, thus, the fixing of pipeline must set up support, in order to bear the thrust of expanding with heat and contract with cold and producing with media interior pressure, but, existing pipeline turns round and threeway, four-way position, the cost of support is very high, thus greatly increases the cost of pipe laying.

Model utility content

The purpose of this utility model is for the problems referred to above, a kind of pressure balance type compensating joint is provided, the blind flange force of pressing generation cannot be born in medium to solve existing compensating joint self, make the fixing of pipeline to set up support, cause the problem that pipe laying cost is high.

The purpose of this utility model is achieved through the following technical solutions:

A kind of pressure balance type compensating joint, it telescopic pipe comprising connecting tube and can be sheathed in connecting tube, the extension sleeve that described telescopic pipe comprises telescopic pipe body and is arranged on telescopic pipe body, on described telescopic pipe body, contiguous extension sleeve place is provided with pressure balance sleeve, one end of described pressure balance sleeve is sealingly fastened on the telescopic pipe body of telescopic pipe, its the other end is sealingly fastened on the extension sleeve of telescopic pipe, and pressure balance sleeve coordinates the extension sleeve of telescopic pipe to be formed with a cavity volume, the telescopic pipe body of described telescopic pipe has water port, and be connected with described cavity volume by this water port, the diameter of described pressure balance sleeve wherein, d is the telescopic pipe body diameter of telescopic pipe.

As preferred version of the present utility model, one end of described pressure balance sleeve is fixed on the telescopic pipe body of telescopic pipe by gland, and its other end is fixed on the extension sleeve of telescopic pipe by gland,

As preferred version of the present utility model, between described pressure balance sleeve, gland, telescopic pipe body, be provided with seal ring, between described pressure balance sleeve, gland, extension sleeve, be provided with seal ring.

As preferred version of the present utility model, described seal ring is wedge-shaped structure.

As preferred version of the present utility model, described extension sleeve and telescopic pipe body are welded to connect.

The beneficial effects of the utility model are, described pressure balance type compensating joint is by setting up pressure balance sleeve in the outside of telescopic pipe, the extension sleeve of telescopic pipe is coordinated to form a cavity volume, and offer water port this cavity volume is connected with telescopic pipe, and then make cavity volume consistent with the pressure medium in telescopic pipe, thus balancing the thrust that media interior pressure produces, structure is simple, be easy to realize.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model pressure balance type compensating joint.

In figure:

1, connecting tube; 2, telescopic pipe; 3, telescopic pipe body; 4, extension sleeve; 5, pressure balance sleeve; 6, the first gland; 7, seal ring; 8, the second gland; 9, the first fixing column; 10, the second fixing column; 11, the 3rd fixing column; 12, the 3rd gland; 13, cavity volume; 14, water port.

Embodiment

The technical solution of the utility model is further illustrated by embodiment below in conjunction with accompanying drawing.Be understandable that, embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.

Please refer to shown in Fig. 1, Fig. 1 is the structural representation of the utility model pressure balance type compensating joint.

In the present embodiment, a kind of pressure balance type compensating joint, it comprises connecting tube 1 and can be sheathed on the telescopic pipe 2 in connecting tube 1, described telescopic pipe 2 comprises telescopic pipe body 3 and welds the extension sleeve 4 be arranged on telescopic pipe body 3, on described telescopic pipe body 3, contiguous extension sleeve 4 place is provided with pressure balance sleeve 5, the left end of described pressure balance sleeve 5 is by the first gland 6, seal ring 7 is sealingly fastened on the telescopic pipe body 3 of telescopic pipe 2, its right-hand member is by the second gland 8, seal ring 7 is sealingly fastened on the extension sleeve 4 of telescopic pipe 2, described seal ring 7 is wedge-shaped structure, pressure balance sleeve 5 left end has been welded to connect the first fixing column 9, described first gland 6, first fixing column 9 passes through stud, nut is fixedly connected with, pressure balance sleeve 5 right-hand member has been welded to connect the second fixing column 10, described connecting tube 1 is welded to connect the 3rd fixing column 11, described second fixing column 10, second gland 8, 3rd fixing column 11 passes through stud, nut is fixedly connected with, described connecting tube 1 is by the 3rd gland 12, seal ring 7 and the telescopic pipe 2 of wedge-shaped structure are tightly connected, described 3rd gland 12, 3rd fixing column 11 passes through stud, nut is fixed, described pressure balance sleeve 5 coordinates the extension sleeve 4 of telescopic pipe 2 to be formed with a cavity volume 13, the telescopic pipe body 3 of described telescopic pipe 2 has water port 14, and be connected with described cavity volume 13 by this water port 14, the diameter of described pressure balance sleeve 5 wherein, d is telescopic pipe body 3 diameter of telescopic pipe 2.

Balance mechanism of the present utility model is: under the effect of pressing in medium, the section S 1 of telescopic pipe 2 left end produces a directed force F 1, the section S 2 of its right-hand member produces a directed force F 2, want negative function power F1, F2, telescopic pipe 2 inside must be made to produce two power in the effect of pressure medium balance, by setting up pressure balance sleeve 5, and coordinate the extension sleeve 4 of telescopic pipe 2, form cavity volume 13, the section S 3 of cavity volume 13 left end produces a directed force F 3, cavity volume 13 right-hand member section S 4 produces a directed force F 4, balance F1, F2, then F3=F2 must be made, F4=F1, and owing to there being the existence of water port 14, this cavity volume 13 is consistent with the pressure medium in telescopic pipe 2, therefore, F1=F2=F3=F4, thus achieve pressure balance.

Due to F1=F2=F3=F4, and cavity volume 13 is consistent with the pressure medium in telescopic pipe 2, can draw:

$P\frac{d^2}{4}=\mathrm{\π}=P\frac{(D^2-d^2)}{4}\mathrm{\π}$

Wherein, P is media interior pressure, and D is the diameter of pressure balance sleeve 5, and d is the diameter of the telescopic pipe body 3 of telescopic pipe 2, so:

$D=\sqrt{2}d$

Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model does not limit by above-described embodiment; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various change and change, and these changes and change all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (5)

1. a pressure balance type compensating joint, it telescopic pipe comprising connecting tube and can be sheathed in connecting tube, it is characterized in that: the extension sleeve that described telescopic pipe comprises telescopic pipe body and is arranged on telescopic pipe body, on described telescopic pipe body, contiguous extension sleeve place is provided with pressure balance sleeve, one end of described pressure balance sleeve is sealingly fastened on the telescopic pipe body of telescopic pipe, its the other end is sealingly fastened on the extension sleeve of telescopic pipe, and pressure balance sleeve coordinates the extension sleeve of telescopic pipe to be formed with a cavity volume, the telescopic pipe body of described telescopic pipe has water port, and be connected with described cavity volume by this water port, the diameter of described pressure balance sleeve wherein, d is the telescopic pipe body diameter of telescopic pipe.

2. pressure balance type compensating joint according to claim 1, is characterized in that: one end of described pressure balance sleeve is fixed on the telescopic pipe body of telescopic pipe by gland, and its other end is fixed on the extension sleeve of telescopic pipe by gland.

3. pressure balance type compensating joint according to claim 2, is characterized in that: be provided with seal ring between described pressure balance sleeve, gland, telescopic pipe body, is provided with seal ring between described pressure balance sleeve, gland, extension sleeve.

4. pressure balance type compensating joint according to claim 3, is characterized in that: described seal ring is wedge-shaped structure.

5. pressure balance type compensating joint according to claim 1, is characterized in that: described extension sleeve and telescopic pipe body are welded to connect.