CN214789723U

CN214789723U - Expansion joint of flange type metal hose

Info

Publication number: CN214789723U
Application number: CN202121202933.0U
Authority: CN
Inventors: 何杰
Original assignee: Chongqing Jieshun Metal Bellows Manufacturing Co ltd
Current assignee: Chongqing Jieshun Metal Bellows Manufacturing Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-19
Anticipated expiration: 2031-05-28

Abstract

The utility model provides an expansion joint of a flange type metal hose, which relates to the technical field of expansion joints, wherein the number of flange plates is two and are respectively positioned at the left side and the right side of the metal hose, the head end and the tail end of the metal hose are fixedly connected with the flange plates, and the head end and the tail end of an expansion wave body are fixedly connected with the flange plates; three expansion inner cavities are arranged on the outer side of the metal hose from left to right at equal intervals, and the expansion inner cavities are annular; all be equipped with the connecting axle on four sides of metal collapsible tube outer wall, the connecting axle is located between the ring flange and with ring flange fastening installation, the connecting axle orientation has the holder corresponding to inflation inner chamber rigidity in metal collapsible tube, the embedding of holder inner wall has the ball, the holder links up in the inflation inner chamber outside, regard as specific flexible deformation position with the inflation inner chamber, the change can appear in the size of inflation inner chamber, by the holder centre gripping inflation inner chamber outside, when keeping metal collapsible tube and ring flange connection form, the position of location inflation inner chamber.

Description

Expansion joint of flange type metal hose

Technical Field

The utility model relates to an expansion joint technical field, more specifically the utility model relates to a flange formula metal collapsible tube's expansion joint.

Background

The expansion joint is a flexible structure provided on the vessel shell or pipe to compensate for additional stresses due to temperature differences and mechanical vibrations. Most of the existing metal hose expansion joints are only provided with a single layer, when the metal hose compensates for the deformation caused by the additional stress of the pipeline, the metal hose is easily affected by the stress of the pipeline and the damage occurs, and the whole pipe body lacks of a specific deformation position, so that the use performance is reduced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: self receives the stress influence of pipeline and the condition of damage appears easily, and because whole root body lacks specific deformation position, performance reduces, to the problem that prior art exists, provides a flange formula metal collapsible tube's expansion joint.

The purpose and the efficacy of the utility model are achieved by the following specific technical means: an expansion joint of a flange type metal hose comprises a flange plate, an expansion corrugated body and a metal hose, wherein the metal hose is sleeved outside the expansion corrugated body, the number of the flange plates is two, the two flange plates are respectively positioned at the left side and the right side of the metal hose, the head end and the tail end of the metal hose are fixedly connected with the flange plate, and the head end and the tail end of the expansion corrugated body are fixedly connected with the flange plate;

three expansion inner cavities are formed in the outer side of the metal hose from left to right at equal intervals, and the expansion inner cavities are annular;

connecting shafts are arranged on four sides of the outer wall of the metal hose, are positioned between the flanges and are fastened and mounted with the flanges, clamping pieces are fixed on the connecting shafts, face the metal hose and correspond to the expansion inner cavity, balls are embedded into the inner walls of the clamping pieces, and the clamping pieces are connected to the outer side of the expansion inner cavity.

Further preferred embodiments: in order to enhance the connectivity of the flange plate and an external pipeline, a sealing ring is embedded in the inner wall of the flange plate, and the interior of the expansion wave body is communicated with the flange plate.

Further preferred embodiments: a gap is arranged between the outer side of the expansion wave body and the inner side of the metal hose, and the outer side of the metal hose is in a convex shape corresponding to the position of the expansion cavity, so that the performance of matching thermal elongation and temperature stress is improved.

Further preferred embodiments: three traction springs are fixed on the upper side and the lower side of the expansion wave body, the traction springs are arranged in a transverse collinear mode, the outer ends of the traction springs are fixed at the inner ends of the metal hoses, the traction springs are inclined, and the connection between the metal hoses and the expansion wave body is guaranteed.

Further preferred embodiments: the clamping piece is connected to the protruding position of the metal hose, the inner side of the ball abuts against the protruding position of the metal hose, and the protruding position of the metal hose can improve the telescopic force of the metal hose.

The utility model has the advantages that:

1. when the expansion wave body deforms to cause size change, the traction spring can also stretch along with the deformation of the expansion wave body, the expansion wave body can be pulled by the traction spring to improve the performance of the expansion wave body for resisting pipeline stress, and if additional stress is caused by high-temperature difference in a pipeline, the temperature in the pipeline is transmitted to a gap between the outer side of the expansion wave body and the inner side of the metal hose, the temperature in the gap is lower than the temperature in the pipeline, the outer wall of the expansion wave body can be protected, and the expansion wave body is prevented from being influenced by the temperature to cause large change of form;

2. the metal hose is made by metal weaving, and after the expansion wave compensates the position of the pipeline and deforms, the metal hose can also stretch and retract, so that the deformation of the expansion wave is compensated in a further matching manner, and the using effect is improved by the double-layer compensation structure;

when the metal hose compensates the expansion wave body, the expansion inner cavity serves as a specific telescopic deformation position, the size of the expansion inner cavity can be changed, the expansion inner cavity is clamped by the clamping piece, the metal hose and the flange plate are kept connected, the position of the expansion inner cavity is located, the protruding position of the expansion inner cavity deformed metal hose is displaced in the clamping piece, the metal hose slides along the ball, the friction force between the metal hose and the inner wall of the clamping piece is reduced through the ball, and the service life of the metal hose is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the inside of the structure of the expansion wave of the present invention;

FIG. 3 is a schematic view of the structure of the connecting shaft of the present invention;

fig. 4 is a schematic diagram of the local enlarged structure at a.

In fig. 1-4: the sealing device comprises a flange plate 1, a sealing ring 101, an expansion wave body 2, a metal hose 3, an expansion inner cavity 301, a traction spring 4, a connecting shaft 5, a clamping piece 501 and balls 6.

Detailed Description

Referring to fig. 1-4, an expansion joint of a flange-type metal hose includes a flange 1, an expansion wave body 2 and metal hoses 3, wherein the metal hoses 3 are sleeved outside the expansion wave body 2, the number of the flange 1 is two and the two flanges are respectively located at the left and right sides of the metal hoses 3, the head and tail ends of the metal hoses 3 are fixedly connected with the flange 1, and the head and tail ends of the expansion wave body 2 are fixedly connected with the flange 1;

a sealing ring 101 is embedded in the inner wall of the flange plate 1, and the interior of the expansion wave body 2 is communicated with the flange plate 1;

specifically, firstly, external pipelines are connected to the left side and the right side of the flange plate 1, and a gap between the pipeline and the inner wall of the flange plate 1 is blocked by a sealing ring 101, so that the connectivity between the pipeline and the flange plate 1 is enhanced, and fluid overflow is avoided;

furthermore, the surface of the expansion wave body 2 is provided with a plurality of circles of corrugations, when fluid flows in the pipeline, the pipeline is easy to expand with heat and contract with cold due to the temperature difference of the fluid, mechanical vibration and the like, so that the size of the pipeline is changed, meanwhile, the pipeline influences the expansion wave body 2, the expansion wave body 2 can expand and compensate the displacement of the pipeline through the expansion wave body 2, the expansion wave body 2 has a telescopic force and can be matched with the pipeline to perform axial, transverse or angular displacement, and therefore the stress of the pipeline is reduced;

a gap is arranged between the outer side of the expansion wave body 2 and the inner side of the metal hose 3;

three traction springs 4 are fixed on the upper side and the lower side of the expansion wave body 2, the traction springs 4 are arranged in a transverse collinear manner, the outer ends of the traction springs 4 are fixed at the inner end of the metal hose 3, and the traction springs 4 are inclined;

furthermore, when the expansion wave body 2 deforms to cause size change, the traction spring 4 can also stretch along with the deformation of the expansion wave body 2, the expansion wave body 2 can be pulled by the traction spring 4, the performance of the expansion wave body 2 for resisting pipeline stress is improved, and if additional stress is caused by high-temperature difference in the pipeline, the temperature in the pipeline is conducted to a gap between the outer side of the expansion wave body 2 and the inner side of the metal hose 3, the temperature in the gap is lower than the temperature in the pipeline, the outer wall of the expansion wave body 2 can be protected, and the phenomenon that the expansion wave body 2 is influenced by the temperature to cause large change of form is avoided;

connecting shafts 5 are arranged on four sides of the outer wall of the metal hose 3, the connecting shafts 5 are located between the flange plates 1 and are tightly fixed with the flange plates 1, the connecting shafts 5 face the metal hose 3 and are fixed with clamping pieces 501 corresponding to the expansion inner cavity 301, balls 6 are embedded in the inner walls of the clamping pieces 501, and the clamping pieces 501 are connected to the outer side of the expansion inner cavity 301;

the state of the expansion wave body 2 and the metal hose 3 is kept by the connecting shafts 5, and the two flange plates 1 are stably connected through the four connecting shafts 5, so that the shape of the whole structure can be maintained;

the metal hose 3 is made by metal weaving, after the expansion wave body 2 compensates the position of the pipeline and deforms, the metal hose 3 can also stretch, the deformation of the expansion wave body 2 is further compensated in a matched manner, and the using effect is improved by the double-layer compensation structure;

three expansion inner cavities 301 are formed in the outer side of the metal hose 3 from left to right at equal intervals, and the expansion inner cavities 301 are annular;

the outer side of the metal hose 3 is convex corresponding to the position of the expansion inner cavity 301; the clamping member 501 is engaged with the protruding position of the metal hose 3, and the inner side of the ball 6 abuts against the protruding position of the metal hose 3;

when the metal hose 3 compensates the expansion wave body 2, the expansion inner cavity 301 serves as a specific telescopic deformation position, the size of the expansion inner cavity 301 changes, the outer side of the expansion inner cavity 301 is clamped by the clamping piece 501, the metal hose 3 is connected with the flange plate 1, the position of the expansion inner cavity 301 is located, the protruding position of the expansion inner cavity 301, where the metal hose 3 deforms, is displaced in the clamping piece 501, the metal hose 3 slides with the balls 6, the friction force between the metal hose 3 and the inner wall of the clamping piece 501 is reduced through the balls 6, and the service life of the metal hose 3 is prolonged.

Claims

1. The expansion joint of the flange type metal hose is characterized by comprising a flange plate (1), expansion corrugated bodies (2) and metal hoses (3), wherein the metal hoses (3) are sleeved outside the expansion corrugated bodies (2), the number of the flange plates (1) is two, the two flange plates are respectively positioned on the left side and the right side of the metal hoses (3), the head end and the tail end of each metal hose (3) are fixedly connected with the flange plate (1), and the head end and the tail end of each expansion corrugated body (2) are fixedly connected with the flange plate (1);

three expansion inner cavities (301) are formed in the outer side of the metal hose (3) from left to right at equal intervals, and the expansion inner cavities (301) are annular;

connecting shafts (5) are arranged on four sides of the outer wall of the metal hose (3), the connecting shafts (5) are located between the flange plates (1) and are tightly mounted with the flange plates (1), clamping pieces (501) are fixed on the connecting shafts (5) towards the metal hose (3) and correspond to the expansion inner cavity (301), balls (6) are embedded into the inner walls of the clamping pieces (501), and the clamping pieces (501) are connected to the outer side of the expansion inner cavity (301).

2. The expansion joint of a flanged metal hose according to claim 1, wherein: the inner wall of the flange plate (1) is embedded with a sealing ring (101), and the interior of the expansion wave body (2) is communicated with the flange plate (1).

3. The expansion joint of a flanged metal hose according to claim 1, wherein: a gap is arranged between the outer side of the expansion wave body (2) and the inner side of the metal hose (3), and the outer side of the metal hose (3) is in a convex shape corresponding to the position of the expansion inner cavity (301).

4. The expansion joint of a flanged metal hose according to claim 1, wherein: the expansion wave body (2) is characterized in that three traction springs (4) are fixed on the upper side and the lower side of the expansion wave body, the traction springs (4) are arranged in a transverse collinear mode, the outer ends of the traction springs (4) are fixed at the inner ends of the metal hoses (3), and the traction springs (4) are all inclined.

5. The expansion joint of a flanged metal hose according to claim 3, wherein: the clamping piece (501) is connected to the protruding position of the metal hose (3), and the inner side of the ball (6) abuts against the protruding position of the metal hose (3).