CN202302447U

CN202302447U - Self-guiding sleeve compensator

Info

Publication number: CN202302447U
Application number: CN2011202310540U
Authority: CN
Inventors: 牛三冲
Original assignee: HENAN ZHONGKE ANTI-CORROSION INSULATION WORKS Co Ltd
Current assignee: HENAN ZHONGKE ANTI-CORROSION INSULATION WORKS Co Ltd
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2012-07-04
Anticipated expiration: 2021-07-04

Abstract

The utility model discloses a self-guiding sleeve compensator. The self-guiding sleeve compensator mainly comprises a casing pipe (2), a core pipe (3), a packing box (4) and a guide pipe (7), wherein the core pipe is positioned in the casing pipe; a clearance is formed between the casing pipe and the core pipe; and the casing pipe is connected with the core pipe by sealing filler filled in the packing box in a sealing way; at least one of the core pipe and the packing box is provided with the guiding pipe in the casing pipe; the guide pipe is supported and positioned by the casing pipe; one side or two sides of the guide pipe are inserted into the core pipe; and a clearance is formed between the outer wall of the guide pipe and the inner wall of the core pipe. According to the self-guiding sleeve compensator disclosed by the utility model, the guide pipe is arranged and the clearance between the outer wall of the guide pipe inserted into the core pipe and the inner wall of the core pipe is extremely small, so that the guide pipe can move axially under the restriction of the inner wall of the core pipe while the guide pipe plays a self-guiding action of the sleeve compensator. The problems that a traditional sleeve compensator is poorer in concentricity and leaks due to high requirement on the mounting concentricity and long stroke are solved; and the aims of convenience for mounting and using, freeness of leakage and increased compensation dosage are achieved.

Description

From the guiding sleeve expansion joint

Technical field

The utility model belongs to the sleeve expansion joint technical field, and what relate generally to is a kind of from leading sleeve expansion joint.Be widely used in heat supply pipeline, oil transport pipeline or other need solve on the pipeline of the problem of expanding with heat and contract with cold that produces because of temperature variation.

Background technique

Sleeve expansion joint is to solve a kind of device (also being used for the pipeline that other have temperature variation) that the pipe temperature problem of expanding with heat and contract with cold is used always on the heat supply pipeline.Shown in Figure 1 promptly is the structure principle chart of existing sleeve expansion joint, and it is made up of fixed end pipe 1, display pipe 2, core pipe 3, stuffing box 4, Gland 5, filler hold-down bolt 6.During work, core pipe 3 produces axial displacement with respect to the fixed end pipe according to need of work in display pipe.Because stuffing box 4 is the parts that are used for the filling stuffing box packing; Stuffing box 4 is static with respect to display pipe 2 with fixed end pipe 1 with the stuffing box packing of its filling; Therefore, the stuffing box packing of filling forms relatively-movable axial stretching friction pair in core pipe 3 outer surfaces and the stuffing box 4.The stuffing box packing of institute's filling is to be pressed on the outer surface of smooth core pipe 3 through gland 5 and hold-down bolt 6 in the stuffing box 4.For the wearing and tearing that reduce stuffing box packing with reduce the frictional force of stuffing box packing and the friction pair of core pipe 3 outer surfaces formation; Avoid the core tube outer surface in the course of the work because of suffering that the Gland 5 and the collision of stuffing box 4 interior round steel materials are damaged; Therefore, the rounded internal surface of Gland 5 and stuffing box 4 must keep certain clearance with the core tube outer surface.Generally be to be adjacent on the outer surface of core pipe 3 through the stuffing box packing with flexibility at present, make Gland 5 and stuffing box 4 and core pipe 3 outer surfaces keep certain clearance, the rounded internal surface of Gland 5 and stuffing box 4 can not play the effect of guiding.

Because the sleeve expansion joint of this structure is from leading device; So; When in heat supply pipeline, using, meeting cause a side of stuffing box packing to receive bigger pressure and be compressed because of the axial decentraction of compensator two duct is flexible, simultaneously; The outer surface of opposite side and core pipe forms the slit, and this inhomogeneous extruding causes sleeve expansion joint to reveal easily.The extending amount of core pipe 3 is big more, causes the axial nonconcentricity of compensator both sides big more, just causes leakage more easily.Because the sleeve expansion joint of this structure is higher to concentricity requirement to the installation shaft of pipeline, not only install and use very inconvenience, and the compensation rate of sleeve expansion joint is restricted also.

Summary of the invention

The purpose of the utility model is to propose a kind of sleeve expansion joint that leads certainly, promptly on the existing technology sleeve expansion joint, has increased guide pipe, and guide pipe plays the effect of guiding certainly of sleeve expansion joint.Solved existing sleeve expansion joint Concentricity tolerance and the leakage problem that concentricity requirement is high, extending amount is big and cause has been installed, reached easy to install, avoid revealing, improving the purpose of compensation rate.

The utility model realizes that the technological scheme that above-mentioned purpose is taked is: a kind of from leading sleeve expansion joint mainly by comprising display pipe, core pipe, stuffing box and guide pipe; The core pipe is positioned at display pipe; Have the gap between display pipe and the core pipe, be tightly connected by the stuffing box packing of filling in the stuffing box, core pipe, stuffing box have one at least; In display pipe, be provided with guide pipe; This guide pipe supports the location by display pipe, and a side of guide pipe or two sides are inserted in the core pipe, and have the gap between the inwall of the outer wall of guide pipe and core pipe.

One end of described display pipe is connected with the fixed end pipe of diameter less than the display pipe diameter, and said guide pipe is fixedly connected with the inwall of fixed end pipe.

Said display pipe set inside ring flat-plate, described guide pipe is fixedly connected with display pipe through this ring flat-plate.

Said stuffing box is provided with to the pressure of stuffing box indentation sealing filler and annotates pipe.

The utility model is owing to be provided with guide pipe, and the guide pipe outer wall that inserts in the core pipe is minimum with the gap of core inner tube wall, guarantees that guide pipe plays sleeve expansion joint in the time of the effect of leading, and can also do axial motion under the constraint of core inner tube wall.Therefore, the concentricity of guide pipe and core pipe can not change.So guide pipe plays the effect that the concentricity of core pipe and the display pipe of sleeve expansion joint remains unchanged.After guide pipe is set, just can not be again cause the inhomogeneous extruding of stuffing box packing to cause sleeve expansion joint to reveal greatly because of the installation reason or the core pipe extending amount of compensator.Reduced the installation concentricity requirement of sleeve expansion joint, can not cause the Concentricity tolerance of core pipe and display pipe greatly, can improve the compensation rate of compensator because of the extending amount of core pipe.

Description of drawings

Fig. 1 is the structural representation of existing sleeve expansion joint;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is the two-way structural representation from the sleeve expansion joint that leads of the utility model;

Fig. 4 is the another kind of two-way structural representation from the sleeve expansion joint that leads of the utility model.

Fig. 5 is the integrated structural representation from the sleeve expansion joint that leads of the utility model core pipe and guide pipe.

Among the figure: 1, fixed end pipe, 2, display pipe, 3, the core pipe, 4, stuffing box, 5, Gland, 6, the filler hold-down bolt, 7, guide pipe, 8, ring flat-plate, 9, press and annotate pipe.

Embodiment

Embodiment 1

Shown in Figure 2 is unidirectional from leading sleeve expansion joint; It is made up of fixed end pipe 1, display pipe 2, core pipe 3, stuffing box 4, Gland 5, filler hold-down bolt 6 and guide pipe 7; Fixed end pipe 1 is fixedly connected with display pipe 2, and its diameter is less than the diameter of display pipe 2.Core pipe 3 is positioned at the inside of display pipe 2, and its outer surface is through smoother after the special processing.Stuffing box 4 is used for the filling stuffing box packing, and the Gland 5 that is used to compress stuffing box packing is arranged between core pipe 3 and the display pipe 2, compresses connection by filler hold-down bolt 6.The stuffing box packing of filling is a flexible material in the stuffing box 4, under the pressure of Gland 5, is adjacent to the smooth outer surface of core pipe 3.Gland 5 has certain clearance with the outer surface of stuffing box 4 and core pipe 3.Guide pipe 7 is arranged in the display pipe 2, and the one of which end is welded on the inwall of fixed end pipe 1, and the other end inserts the inside of core pipe 3, and the gap between the inwall of the outer wall of guide pipe and core pipe is minimum.

Embodiment 2

Structural representation for the two-way sleeve expansion joint that leads certainly shown in Figure 3, the two-way sleeve expansion joint that leads certainly is by display pipe 2, core pipe 3, stuffing box 4, guide pipe 7, ring flat-plate 8 and press notes pipe 9 to form, and core pipe 3 is two, is symmetricly set on the two ends of display pipe 2.One end of two core pipes 3 is all inserted in display pipe 2, compresses connection by two stuffing boxes 4 that are arranged in the display pipe 2 respectively, promptly realizes compressing connection through indentation sealing filler in stuffing box 4.On stuffing box 4, be respectively arranged with to the pressure of stuffing box 4 indentation sealing fillers and annotate pipe 9.Ring flat-plate 8 is arranged on center portion in the display pipe 2; Be welded to connect with display pipe 2; The middle part of guide pipe 7 and ring flat-plate 8 are welded to connect, and the inside of the core pipe 3 at display pipe 2 two ends is inserted at the two ends of guide pipe 7 respectively, and the gap between the inwall of the outer wall of guide pipe 7 and core pipe 3 is minimum.

Embodiment 3

Structural representation for the another kind of two-way sleeve expansion joint that leads certainly shown in Figure 4; This kind is two-way to be made up of display pipe 2, core pipe 3, stuffing box 4, Gland 5, guide pipe 7, ring flat-plate 8 from the sleeve expansion joint that leads; Core pipe 3 is two; The inside of two core pipes 3 is all inserted at the two ends of guide pipe 7, and the gap between the inwall of the outer wall of guide pipe 7 and core pipe is minimum.Between two core pipes 3 and display pipe 2, be provided with the stuffing box 4 of filling stuffing box packing, the outside is pressed on stuffing box packing on the outer surface of core pipe 3 by filler hold-down bolt 6 through Gland 5.Ring flat-plate 8 is arranged on intermediate portion in the display pipe 2, is welded to connect with display pipe 2, and the middle part of guide pipe 7 and ring flat-plate 8 are welded to connect.

Embodiment 4

Structural representation for core pipe and the integrated sleeve expansion joint that leads certainly of guide pipe shown in Figure 5; Core pipe and guide pipe are integrated to be on embodiment 1 architecture basics from the sleeve expansion joint that leads; The core pipe 3 that will be positioned at display pipe 2 adds the inside of growing to insertion fixed end pipe 1; Play the effect of guide pipe, it is incorporate from leading sleeve expansion joint to become core pipe and guide pipe, and it is minimum that core pipe 3 inserts the outer wall and the gap between fixed end pipe 1 inwall of fixed end pipe 1 interior section.

Claims

1. one kind from the sleeve expansion joint that leads; Mainly comprise display pipe (2), core pipe (3) and stuffing box (4), the core pipe is positioned at display pipe, has the gap between display pipe (2) and the core pipe (3); Stuffing box packing by the interior filling of stuffing box (4) is tightly connected; It is characterized in that: described core pipe (3) and stuffing box (4) have one at least, in described display pipe (2), are provided with guide pipe (7), and this guide pipe (7) supports the location by display pipe (2); One side of guide pipe (7) or two sides are inserted in the core pipe (3), and have the gap between the inwall of the outer wall of guide pipe and core pipe.

2. according to claim 1 from leading sleeve expansion joint, it is characterized in that: the end at described display pipe (2) is connected with the fixed end pipe (1) of diameter less than display pipe (2) diameter, and said guide pipe (7) is fixedly connected with the inwall of fixed end pipe (1).

3. according to claim 1 from leading sleeve expansion joint, it is characterized in that: at said display pipe (2) set inside ring flat-plate (8), described guide pipe (7) is fixedly connected with display pipe (2) through this ring flat-plate (8).

4. according to claim 1 from leading sleeve expansion joint, it is characterized in that: said stuffing box (4) is provided with to the pressure of stuffing box (4) indentation sealing filler and annotates pipe (9).

5. according to claim 1 from leading sleeve expansion joint, it is characterized in that: the said core pipe (3) that is positioned at display pipe (2) is added grow to fixed end pipe (1) position and insert fixed end pipe (1) inside.