CN203585684U - High-pressure rotating compensator - Google Patents

Abstract

The utility model discloses a high-pressure rotating compensator which comprises a shell, an inner pipe, a steel ball, a left ring, a pad, a right ring, fillers, a flange, a pressing cover and a bolt component. The shell and the inner pipe are coaxially sleeved, an arc groove matched with the steel ball is formed in the right end face of a convex annular shoulder outside the inner pipe, the inner pipe, the steel ball and the left ring collectively form a rotating moving pair, the pad, the right ring and the fillers are sequentially mounted at a gap between an inner hole of the right end of the shell and the outer wall of the inner pipe from left to right and collectively connected in a limiting manner through the pressing cover, the flange and the bolt component to form an axial floating seal structure, the inner pipe moves along with built-in medium pressure, an inner hole of the pressing cover is provided with an annular groove, and the steel ball is arranged in the annular groove to form a moving pair for supporting an outlet end of the inner pipe in a rolling manner. The radial sizes of the shell and the convex annular shoulder outside the inner pipe are small, the shell and the convex annular shoulder outside the inner pipe are easily forged, welding seams in the structure are omitted, the strength cannot lose, and the high-pressure rotating compensator is particularly suitable for running under high-temperature and high-pressure working conditions.

Description

High-pressure rotary compensator

Technical field

The utility model relates to a kind of pipe line compensating device, and specifically, the utility model relates to a kind of for absorbing the whirl compensator of heat distribution pipeline end thrust and compensate for displacement.

Background technique

Generally, the heat distribution pipeline transmission distance of large-scale thermoelectricity plant and petrochemical industry is long, and built-in vapor (steam) temperature is high, pressure is large, and the heat distortion amount of generation is relatively large, and end thrust wherein has very holocaust power to heat distribution pipeline.During engineering design in order to ensure heat distribution pipeline safe operation, must be on heat distribution pipeline interdependent node configuring pipes compensation device.Under prior art condition, first-selected pipe safety device is whirl compensator.The structure characteristic of whirl compensator is that import and export are equal coupling pipe, and thickness of pipe wall can be set by voltage withstand class, adds rotational structure motion flexibly, and can be connected into joint connection structure according to the trend of heat distribution pipeline.In view of above structural advantages, whirl compensator is widely used in heat distribution pipeline.Although the commodity whirl compensator specification of supplying on market is different, its agent structure is basic identical, and critical piece is all realized shaping by welding procedure.For these special-shaped parts, adopt that welding procedures are easily shaped, fabricating cost is low, can meet the supporting requirement of conventional heat distribution pipeline completely.But, the heat distribution pipeline transmission vapor (steam) temperature of some thermoelectricity plants and petrochemical industry is higher than 420 ℃, and pressure is greater than 10MPa, and the whirl compensator of prior art moves and mainly has two large problems under this type of operating mode, the one, poorly sealed problem, the 2nd, the poor problem of weld strength in structure.The whirl compensator sealing configuration of prior art is artificial regulation structure, under high temperature and high pressure condition, moving a period of time sealing pair just easily lost efficacy, the leakage rate producing is pressed into proportional relation with carrying, and need to make manual maintenance guarantee according to actual leakage situation and normally move.The industry, for accomplishing whirl compensator safe operation under high temperature and high pressure condition, adopts high strength alloy steel making inner tube and housing conventionally.The inner tube and the housing outside dimension that because of flange, connect are larger, are obviously not suitable for being shaped with bar turning, although welding procedure can realize high efficiency manufacture, have weld seam in structure.Known from < < welding technology > > and < < Metallography > >, the weldability of high strength alloy steel is poor, welding conditions requires very high, particularly before large-size components weldering, heating is difficult, it is more difficult under constant temperature, to weld, and postwelding also will be done bulk heat treatment to eliminate welding stress.So under general welding condition, common welder can not guarantee welding quality, even if also needing to do necessary check, high-grade welder operation could assert quality.Briefly, the whirl compensator moving under high temperature and high pressure condition is as long as adopt welding line structure just to have potential safety hazard, and user is supporting very careful.

Model utility content

Mainly for prior art products, there is weld seam problem and poorly sealed problem in the utility model, propose a kind of simple in structure, sealing is reliable, steady quality and the good high-pressure rotary compensator of Security.Because adopting floating sealing structure, its sealability, along with pressure increases and improves, is added inner tube and housing and is adopted excellent suitability for press forming, and no-welding-seam in structure, guarantees safe operation.

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

High-pressure rotary compensator, it comprises housing, inner tube, steel ball, left ring, pad, right ring, filler, flange, gland and bolt assembly.The integrated more piece pipe of described housing, holds greatly coaxial fit inner tube in endoporus to form the equal straight-through tube in aperture.Its improvements are: described inner tube left end outer wall is provided with evagination annular shoulder and coordinates with housing intermediate section pipe hold gap, and the right side of evagination annular shoulder is provided with the arc groove coordinating with steel ball, the common kinematic pair that forms a rotation of inner tube, steel ball and left ring.Gap between described housing right-hand member endoporus and outer wall of inner tube, pad, right ring and the filler installed successively from left to right, jointly by the spacing connection of gland, flange and bolt assembly, formation inner tube is moving axial float sealing configuration with built-in pressure medium.Described gland endoporus is provided with ring groove, and in ring groove, uniform steel ball forms the kinematic pair to inner tube outlet end rolling bearing.

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

1, housing and inner tube are all provided with external ring-shaped shoulder, because shoulder is less than flange edge radial dimension, are easy to formed by forging, and forging, except saving machining man-hour, has also been saved raw material, the most important thing is main component integrated welding seam-free, and intensity is secure;

2, axial float sealing configuration is simple, and inner tube is moved with the pressure of built-in medium, and pressure is larger, and sealing effect is better;

3, because axial float sealing configuration is the non-specified pressure-bearing that continues, stuffing box packing is difficult for occurring fatigue loss, and sealability continues to keep.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.

The present embodiment is supporting in the heat distribution pipeline of thermoelectricity plant, 450 ℃ of its built-in steam, and pressure is 10MPa.Because of operating mode more severe, housing 1 and inner tube 2 are all used 15CrMo steel making, because of the weldability of this material bad, housing 1, inner tube 2 all adopt formed by forging, concrete structure high-pressure rotary compensator as shown in Figure 1, it comprises housing 1, inner tube 2, steel ball 3, left ring 4, pad 5, right ring 6, filler 7, flange 8, gland 9 and bolt assembly 10.The integrated more piece pipe of described housing 1, holds greatly coaxial fit inner tube 2 in endoporus to form the equal straight-through tube in aperture.Described inner tube 2 left end outer walls are provided with evagination annular shoulder and coordinate with housing 1 intermediate section pipe hold gap, and the right side of evagination annular shoulder is provided with the arc groove coordinating with steel ball 3, inner tube 2, steel ball 3 and the common kinematic pair that forms a rotation of left ring 4.Gap between described housing 1 right-hand member endoporus and inner tube 2 outer walls, pad 5, right ring 6 and the filler 7 installed successively from left to right, by gland 9, flange 8 and the spacing connection of bolt assembly 10, formation inner tube 2 is moving axial float sealing configuration with built-in pressure medium jointly.This structure keeps sealing state under normal condition, and when built-in pressure medium raises, the inner tube 2 moving to right drives steel balls 3, left ring 4, pad 5 and right ring 6 filler 7 of jointly exerting pressure, and sealability is further improved, and avoids occurring unnecessary leakage.Once built-in pressure medium declines, above each part is done reverse movement, until keep original sealing state.Inner tube 2 in structure except being passage, must bear rotating or axial displacement relative to housing 1, in order to improve the kinematic dexterity of inner tube 2, at gland 9 endoporus, be provided with ring groove, the kinematic pair that in ring groove, uniform steel ball 3 forms inner tube 2 outlet end rolling bearings.Inner tube 2 is under rotary motion pair and the secondary common supporting of rolling motion, and rotation is flexible, nose balance is timely, the Security that greatly improves matched with hot hydraulic piping.Housing 1 in the utility model and inner tube 2 external ring-shaped shoulder radial dimensions are little, adopt formed by forging.High strength alloy steel can improve metal structure through formed by forging, improves strength character, saves again machining man-hour simultaneously, and saves a large amount of raw material, and manufacture cost is relatively low.Housing 1 and inner tube 2 adopt formed by forging, and maximum benefit is no-welding-seam in structure, and the intensity of product is secure, does not have problems of welded quality.

Claims (1)

1. a high-pressure rotary compensator, it comprises housing (1), inner tube (2), steel ball (3), left ring (4), pad (5), right ring (6), filler (7), flange (8), gland (9) and bolt assembly (10); The integrated more piece pipe of described housing (1), holds greatly coaxial fit inner tube (2) in endoporus to form the equal straight-through tube in aperture; It is characterized in that: described inner tube (2) left end outer wall is provided with evagination annular shoulder and coordinates with housing (1) intermediate section pipe hold gap, the right side of evagination annular shoulder is provided with the arc groove coordinating with steel ball (3), and inner tube (2), steel ball (3) and left ring (4) form the kinematic pair of a rotation jointly; Gap between described housing (1) right-hand member endoporus and inner tube (2) outer wall, pad (5), right ring (6) and the filler (7) installed successively from left to right, by gland (9), flange (8) and the spacing connection of bolt assembly (10), formation inner tube (2) is moving axial float sealing configuration with built-in pressure medium jointly; Described gland (9) endoporus is provided with ring groove, and in ring groove, uniform steel ball (3) forms the kinematic pair to inner tube (2) outlet end rolling bearing.

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