CN203730996U - Balanced buried compensator - Google Patents

Abstract

The utility model discloses a balanced buried compensator. The balanced buried compensator comprises a connecting pipe, a flow guide cylinder, an outer pipe, a corrugated pipe, overlapping pipes, an inner pipe, a sealing head and a baffle ring, wherein the outer pipe is a two-section isodiametric coaxial conjoined pipe; the pipe opening at the left end of the outer pipe is connected with the connecting pipe and the flow guide cylinder in a sealed way; a platform shoulder which is protruded outward radially is arranged at the left end of the inner pipe; the sealing end is connected with the outer wall of a neck part at the other end of the inner pipe in the sealed way; the left end of the inner pipe placed in the inner cavity of the outer pipe is matched with the right end of the flow guide cylinder; two groups of elastic components which sleeve the outer wall of the inner pipe in sequence are respectively positioned in a left cavity and a right cavity of the outer pipe and are respectively connected with adjacent end surfaces in the sealed way through the overlapping pipes to form a relatively independent compensation structure. The sealing head, a gland and filler form a sliding sealing pair which is matched with the inner wall of the outer pipe; the pipe opening at the right end of the outer pipe is fixedly connected with the baffle ring; the baffle ring is matched with the end surface of the gland in a contact way to form a protective structure of the sliding sealing pair. The corrugated pipe is prevented from being corroded by a transmission medium, so that the service life of the compensator is prolonged, and the safety operation of a buried pipeline is facilitated.

Description

The buried compensator of balance type

Technical field

The utility model relates to a kind of pipe safety device, and specifically, it is the supporting compensator of buried pipe that the utility model relates to a kind of.

Background technique

Some industrial pipe networks and urban heating network, by reasons such as technological requirement or condition restriction, often adopt buried arranged in form pipeline.The advantage of buried pipe is apparent, and it neither takes up room, Security is good, installation cost is low, is conducive to again make thermal insulation layer at pipeline outer wall.However, the problem that buried pipe exposes in actual use can not be ignored, and maximum problem is to be not easy to observe pipeline running state, is more not easy to General Maintenance and replacing.In engineering, in order to reduce the negative effect of the problems referred to above, conventionally the supporting compensator of buried pipe is had to better quality requirement.Although prior art products can improve quality by quality control, to meet the object of ducts safe operation.But, the sealing configuration of prior art products is unreasonable, sealability is not lasting, particularly after stuffing box packing wearing and tearing, the medium of transmission easily infiltrates in the cavity of bellows outer wall and outer tube wall containing from gap, if medium has corrosivity, the bellows of thin-walled is formed to etching condition, once the tube wall of bellows penetrates, pipeline compensator is just scrapped.Due to the particularity of buried pipe, to safeguard, to change difficulty large, causes maintenance cost large, promptness is poor.

Model utility content

The utility model is mainly for the deficiencies in the prior art, and proposition one is simple in structure, making is easy, seal tightly, compensate the buried compensator of a kind of balance type flexibly.

The utility model is achieved through the following technical solutions technical goal.

The buried compensator of balance type, it comprises adapter, guide shell, outer tube, bellows, overlap joint pipe, inner tube, end socket and back-up ring.Described outer tube is a kind of isometrical coaxial conjuncted pipe of two joints taking dividing plate as boundary, left end ferrule connecting tubes, the nozzle inner wall guide shell that is tightly connected.Described inner tube is circle straight tube, bore is identical with adapter, and inner tube left end outer wall is provided with radially evagination shoulder, and end socket is tightly connected on the other end neck outer wall, evagination shoulder and end socket all with outer tube wall Spielpassung, insert the left people's guide shell of the inner tube right-hand member fit in outer tube bore.Its improvements are: on described outer wall of inner tube, order is set with two groups of elastic components, elastic component forms by overlapping the alternate bellows being tightly connected of pipe, two groups of elastic components lay respectively among He You chamber, the left chamber of outer tube, and are managed with adjacent end face seal and connected and composed relatively independent collocation structure by overlap joint separately.Described end socket right side cylindrical is inclined-plane, and end socket right side coordinates formation outer ring groove with gland, setting-in filler in annular groove outside, and with inner tube, moving filler coordinates formation sliding sealing pair with outer tube wall.The described outer tube right-hand member mouth of pipe is fixedly connected with back-up ring, and back-up ring coordinates the protection structure forming sliding sealing pair with gland end contact.

In said structure, the waveform of bellows is U-shaped single layer structure.

The utility model compared with prior art, has following good effect:

1, two groups of elastic component reversing motions are each other simple in structure, and balancing axial thrust effect is obvious;

2, back-up ring coordinates with gland end face, strengthens sealability, guarantees the dielectric corrosion that bellows is not transmitted, and greatly improves compensator working life.

Brief description of the drawings

Fig. 1 is that the utility model structure is partly cutd open schematic diagram.

Fig. 2 is Figure 1A place partial structurtes enlarged diagram.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings below.

The buried compensator of balance type shown in Fig. 1 is the embodiment who is applied in heating network, its bore 200mm, and nominal pressure 1.0MPa, it comprises adapter 1, guide shell 2, outer tube 3, bellows 4, overlap joint pipe 5, inner tube 6, end socket 7 and back-up ring 8.Described outer tube 3 is a kind of isometrical coaxial conjuncted pipes of two joints taking dividing plate 3.1 as boundary, and left end ferrule connecting tubes 1, takes over 1 inner wall sealing and connect guide shell 2.Described inner tube 6 is circle straight tube, bore is identical with adapter 1, inner tube 6 left end outer walls are provided with radially evagination shoulder 6.1, end socket 7 is tightly connected on the other end neck outer wall, evagination shoulder 6.1 and end socket 7 all with outer tube 3 inwall Spielpassung, insert inner tube 6 left ends and guide shell 2 right-hand member fits in outer tube 3 inner chambers.In order to improve the operation matter state of compensator, the utility model order on inner tube 6 outer walls is set with two groups of elastic components, and elastic component forms by overlapping the pipe 5 alternate bellowss that are tightly connected 4.The waveform of described bellows 4 is U-shaped, and is single layer structure.Two groups of elastic components lay respectively among He You chamber, the left chamber of outer tube 3, and manage 5 by overlap joint separately and connect and compose relatively independent collocation structure with adjacent end face seal.In this collocation structure, when inner tube 6 is affected by connecting tube end thrust and when left lateral, is arranged in the bellows 4 in outer tube 3 left chambeies by axial tension, be positioned at the bellows in outer tube 3 right chambeies by axial compression.When right lateral, be arranged in the bellows 4 in outer tube 3 left chambeies by axial compression if inner tube 6 is affected by connecting tube end thrust, be positioned at 4 of the bellowss in outer tube 3 right chambeies by axial tension.Above-mentioned two groups of elastic components reversing motion structure each other, can play the thrust of pushing in balance institute's connecting leg road, directly improves the operation matter state of compensator.Described end socket 7 is the shaft seal carriers in the utility model, end socket 7 right side cylindricals are inclined-plane, end socket 7 right sides coordinate formation outer ring groove with gland 7.1, in annular groove, the filler 7.2 of setting-in is that moving filler 7.2 coordinates formation sliding sealing pair with outer tube 3 inwalls with inner tube 6 outside.This sliding sealing pair stops transmission medium to infiltrate, and plays the effect that protection bellows 4 is not corroded.The utility model leaks after filler 7.2 excessive wears in order to prevent; be fixedly connected with back-up ring 8 at the outer tube 3 right-hand member mouths of pipe; back-up ring 8 coordinates the protection structure forming sliding sealing pair with gland 7.1 end contacts; guarantee that bellows 4 is not transmitted dielectric corrosion; thereby greatly improve compensator working life, be conducive to the safe operation of buried pipe.

Claims (2)

1. the buried compensator of balance type, it comprises adapter (1), guide shell (2), outer tube (3), bellows (4), overlap joint pipe (5), inner tube (6), end socket (7) and back-up ring (8); Described outer tube (3) is a kind of isometrical coaxial conjuncted pipe of two joints taking dividing plate (3.1) as boundary, and left end ferrule connecting tubes (1), takes over (1) inner wall sealing and connect guide shell (2); Described inner tube (6) is circle straight tube, bore is identical with adapter (1), inner tube (6) left end outer wall is provided with radially evagination shoulder (6.1), end socket (7) is tightly connected on the other end neck outer wall, evagination shoulder (6.1) and end socket (7) all with outer tube (3) inwall Spielpassung, insert inner tube (6) left end and guide shell (2) right-hand member fit in outer tube (3) inner chamber; It is characterized in that: on described inner tube (6) outer wall, order is set with two groups of elastic components, elastic component is by overlapping pipe (5) and the alternate bellows being tightly connected (4) forms, two groups of elastic components lay respectively among He You chamber, the left chamber of outer tube (3), and manage (5) by overlap joint separately and connect and compose relatively independent collocation structure with adjacent end face seal; Described end socket (7) right side cylindrical is inclined-plane, end socket (7) right side coordinates formation outer ring groove with gland (7.1), setting-in filler (7.2) in annular groove outside, with inner tube (6), moving filler (7.2) coordinates formation sliding sealing pair with outer tube (3) inwall; Described outer tube (3) the right-hand member mouth of pipe is fixedly connected with back-up ring (8), and back-up ring (8) coordinates the protection structure forming sliding sealing pair with gland (7.1) end contact.

2. the buried compensator of balance type according to claim 1, is characterized in that: the waveform of described bellows (4) is U-shaped single layer structure.