CN211083284U

CN211083284U - Seamless steel pipe

Info

Publication number: CN211083284U
Application number: CN201921666245.2U
Authority: CN
Inventors: 牟荣国
Original assignee: Changzhou Kangcheng Precision Steel Pipe Co ltd
Current assignee: Changzhou Kangcheng Precision Steel Pipe Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-24
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to the technical field of steel pipes, in particular to a seamless steel pipe, which comprises an outer pipe body and an inner pipe body, wherein the inner pipe body is arranged in an inner cavity of the outer pipe body, the central axis of the outer pipe body and the central axis of the inner pipe body are arranged in parallel, a plurality of connecting components arranged around the inner pipe body are arranged between the outer pipe body and the inner pipe body, each connecting component comprises a first connecting rod, a second connecting rod, a first spring, a second spring, a first supporting rod, a second supporting rod and a rotary rod, two sections of internal threads with opposite rotation are arranged at two ends of the rotary rod, one end of the first connecting rod is in threaded connection with the rotary rod, when the seamless steel pipe is used, the connecting components are arranged between the inner pipe body and the outer pipe body, the connecting components have a supporting effect on the inner pipe body, and simultaneously have, the phenomenon of mutual collision between the inner pipe body and the outer pipe body is prevented.

Description

Seamless steel pipe

Technical Field

The utility model belongs to the technical field of the steel pipe technique and specifically relates to a seamless steel pipe is related to.

Background

The pressure pipeline, especially the steam pipeline, has boiling hot water as the inner medium, and the pipe wall is thinned due to the long-term wear of the pipeline, and the pipeline pressure reaches the bearing capacity of the pipe, thus causing the explosion accident of the pipeline. After every 3-5 years of use of the steam pipes, it is recommended to carry out a pressure-bearing test of the test pipes. The corrosion of the steam pipeline is easy to occur at the bending and turning positions of the pipeline, and the steam flows into the streamline pipe section and flows to the changed positions.

The existing pressure pipeline is simple in structure, floating spaces are not formed in the pipelines in a fixed mode, the pipelines are externally impacted, or when fluid in the pipelines impacts the pipelines, normal use of the pressure pipeline can be influenced for a long time, and the service life of the pressure pipeline can be shortened.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problems that the existing pressure pipeline is simple in structure, floating spaces are not arranged between pipelines in a fixed mode, the pipelines are externally impacted, or the pipelines are impacted by fluid in the pipelines, the normal use of the pressure pipeline can be influenced for a long time, and the service life of the pressure pipeline can be prolonged, a seamless steel pipe is provided.

The utility model provides a technical scheme that its technical problem adopted is: a seamless steel tube comprises an outer tube body and an inner tube body, wherein the inner tube body is arranged in an inner cavity of the outer tube body, the central axis of the outer tube body and the central axis of the inner tube body are arranged in parallel, a plurality of connecting assemblies arranged around the inner tube body are arranged between the outer tube body and the inner tube body, each connecting assembly comprises a first connecting rod, a second connecting rod, a first spring, a second spring, a first supporting rod, a second supporting rod and a rotating rod, two sections of internal threads with opposite rotation are arranged at two ends of the rotating rod, one end of the first connecting rod is in threaded connection with the rotating rod, one end of the first connecting rod, far away from the rotating rod, is provided with a first sliding groove along the axial direction of the first connecting rod, the first sliding groove is matched with the first supporting rod, one end of the first supporting rod is arranged in the first sliding groove in a sliding manner, and the first spring, the end, far away from first connecting rod, of first bracing piece articulates on the internal perisporium of outer body, be provided with the first displacement mechanism that is used for restricting first bracing piece radial displacement between first bracing piece and the first connecting rod, the one end threaded connection of second connecting rod is in the one end that first connecting rod was kept away from to the rotary rod, the second spout has been seted up along its axial to the one end that the rotary rod was kept away from to the second connecting rod, second spout and second bracing piece phase-match, the one end of second bracing piece slides and sets up in the second spout, the second spring is located between second spout and the second bracing piece, the one end that the second connecting rod was kept away from to the second bracing piece articulates on the periphery wall of inner tube body, be provided with the second displacement mechanism that is used for restricting the radial displacement of second bracing piece between second bracing piece and the second connecting rod. Through set up coupling assembling between body and outer body including, coupling assembling has the supporting role to the internal body, and outside atress coupling assembling has the cushioning effect to the internal body simultaneously.

Furthermore, the first displacement mechanism comprises a first limiting block arranged on the first support rod, a first limiting groove is formed in the inner peripheral wall of the first connecting rod, the first limiting groove is axially arranged along the first connecting rod and matched with the first limiting block, and the first limiting block is arranged in the first limiting groove.

Further, the second displacement mechanism comprises a second limiting block arranged on the second supporting rod, the second connecting rod is located on the inner peripheral wall of the second sliding groove and provided with a second limiting groove, the second limiting groove is axially arranged along the second connecting rod and matched with the second limiting block, and the second limiting block is arranged in the second limiting groove.

The utility model has the advantages that: the utility model discloses seamless steel pipe is when using, through including between body and the outer body set up coupling assembling, coupling assembling has the supporting role to the internal body, there is the cushioning effect to the internal body in external atress coupling assembling simultaneously, prevent the phenomenon of mutual collision between internal body and the outer body, current pipeline under pressure simple structure has been avoided, and reciprocal anchorage does not have the floating space between the pipeline, externally receive the impact, perhaps when its inside emergence fluid causes the impact to the pipeline, can influence the normal use of pipeline under pressure for a long time, also can reduce the problem of pipeline under pressure's life.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a front view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic view of the installation structure between the rotating rod, the first connecting rod and the first supporting rod of the present invention.

In the figure: 1. outer body, 2, interior body, 3, first connecting rod, 4, second connecting rod, 5, first spring, 6, second spring, 7, first bracing piece, 8, second bracing piece, 9, rotary rod, 10, first spout, 11, second spout, 12, first stopper, 13, first spacing groove, 14, second stopper.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1-3, a seamless steel tube comprises an outer tube 1 and an inner tube 2, the inner tube 2 is disposed in an inner cavity of the outer tube 1, a central axis of the outer tube 1 and a central axis of the inner tube 2 are parallel to each other, a plurality of connecting assemblies disposed around the inner tube 2 are disposed between the outer tube 1 and the inner tube 2, each connecting assembly comprises a first connecting rod 3, a second connecting rod 4, a first spring 5, a second spring 6, a first supporting rod 7, a second supporting rod 8 and a rotating rod 9, two opposite internal threads are disposed at two ends of the rotating rod 9, one end of the first connecting rod 3 is screwed on the rotating rod 9, a first sliding groove 10 is disposed at one end of the first connecting rod 3 away from the rotating rod 9 along an axial direction thereof, the first sliding groove 10 is matched with the first supporting rod 7, one end of the first supporting rod 7 is slidably disposed in the first sliding groove 10, the first spring 5 is located between a first sliding groove 10 and a first supporting rod 7, one end of the first supporting rod 7, which is far away from the first connecting rod 3, is hinged to the inner peripheral wall of the outer tube body 1, a first displacement mechanism for limiting radial displacement of the first supporting rod 7 is arranged between the first supporting rod 7 and the first connecting rod 3, one end of the second connecting rod 4 is in threaded connection with one end of the rotating rod 9, which is far away from the first connecting rod 3, a second sliding groove 11 is axially formed in one end of the second connecting rod 4, which is far away from the rotating rod 9, the second sliding groove 11 is matched with the second supporting rod 8, one end of the second supporting rod 8 is slidably arranged in the second sliding groove 11, the second spring 6 is located between the second sliding groove 11 and the second supporting rod 8, one end of the second supporting rod 8, which is far away from the second connecting rod 4, is hinged to the outer peripheral wall of the inner tube body 2, and a second displacement mechanism for limiting radial displacement of the second supporting rod 8 is arranged And (4) a mechanism.

First displacement mechanism is including setting up first stopper 12 on first bracing piece 7, first connecting rod 3 is located first spout 10 internal perisporium and has seted up first spacing groove 13, first spacing groove 13 along 3 axial settings of first connecting rod and with first stopper 12 phase-match, first stopper 12 sets up in first spacing groove 13. First stopper 12 and first spacing groove 13 mutually support, have prevented the phenomenon of following between rotary rod 9 and the first connecting rod 3 and have rotated, and second stopper 14 and the second spacing groove mutually support, have prevented the phenomenon of following between rotary rod 9 and the second connecting rod 4 and have rotated.

The second displacement mechanism comprises a second limiting block 14 arranged on the second support rod 8, the second connecting rod 4 is positioned on the inner peripheral wall of the second sliding groove 11 and is provided with a second limiting groove, the second limiting groove is axially arranged along the second connecting rod 4 and is matched with the second limiting block 14, and the second limiting block 14 is arranged in the second limiting groove.

When the seamless steel pipe is adjusted, firstly, the rotating rod 9 is rotated according to the installation requirement, so that the acting force of the first spring 5 in the first sliding groove 10 and the acting force of the second spring 6 in the second sliding groove 11 are adjusted, the rotating rod 9 is rotated, the first connecting rod 3 and the second connecting rod 4 at two ends of the rotating rod 9 are relatively close to or far away from each other, the first sliding groove 10 on the first connecting rod 3 and the first supporting rod 7 are relatively displaced, the buffer distance of the first spring 5 is adjusted, meanwhile, the second sliding groove 11 on the second connecting rod 4 and the second supporting rod 8 are relatively displaced, the buffer distance of the second spring 6 is adjusted, and the connecting assembly is sequentially adjusted to a required position;

when using, when outer body 1 atress, the effort is on outer body 1 to make interior body 2 take place the displacement to outer body 1 relatively, interior body 2 is to lieing in the displacement of one side of outer body 1 atress, just also the second bracing piece 8 on the coupling assembling of one side is at second spout 11 internal displacement and extrusion second spring 6, and first bracing piece 7 is the first spout 10 displacement and the extrusion first spring 5 relatively simultaneously, thereby makes interior body 2 obtain the buffering damping.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A seamless steel pipe, its characterized in that: the connecting device comprises an outer pipe body (1) and an inner pipe body (2), wherein the inner pipe body (2) is arranged in an inner cavity of the outer pipe body (1), the central axis of the outer pipe body (1) and the central axis of the inner pipe body (2) are arranged in parallel, a plurality of connecting components arranged around the inner pipe body (2) are arranged between the outer pipe body (1) and the inner pipe body (2), each connecting component comprises a first connecting rod (3), a second connecting rod (4), a first spring (5), a second spring (6), a first supporting rod (7), a second supporting rod (8) and a rotating rod (9), two sections of internal threads with opposite rotation are arranged at two ends of the rotating rod (9), one end of the first connecting rod (3) is in threaded connection with the rotating rod (9), and a first sliding groove (10) is arranged at one end, far away from the rotating rod (9), of the first connecting rod (3) along, the first sliding groove (10) is matched with the first supporting rod (7), one end of the first supporting rod (7) is arranged in the first sliding groove (10) in a sliding mode, the first spring (5) is located between the first sliding groove (10) and the first supporting rod (7), one end, far away from the first connecting rod (3), of the first supporting rod (7) is hinged to the inner peripheral wall of the outer pipe body (1), a first displacement mechanism used for limiting radial displacement of the first supporting rod (7) is arranged between the first supporting rod (7) and the first connecting rod (3), one end of the second connecting rod (4) is in threaded connection with one end, far away from the first connecting rod (3), of the rotating rod (9) of the second connecting rod (4), a second sliding groove (11) is formed in the axial direction of the second connecting rod, the second sliding groove (11) is matched with the second supporting rod (8), one end of the second supporting rod (8) is arranged in the second sliding mode, the second spring (6) is located between the second sliding groove (11) and the second supporting rod (8), one end, far away from the second connecting rod (4), of the second supporting rod (8) is hinged to the outer peripheral wall of the inner tube body (2), and a second displacement mechanism used for limiting radial displacement of the second supporting rod (8) is arranged between the second supporting rod (8) and the second connecting rod (4).

2. The seamless steel pipe according to claim 1, characterized in that: first displacement mechanism is including setting up first stopper (12) on first bracing piece (7), first connecting rod (3) are located first spout (10) internal perisporium and have seted up first spacing groove (13), first spacing groove (13) along first connecting rod (3) axial setting and with first stopper (12) phase-match, first stopper (12) set up in first spacing groove (13).

3. The seamless steel pipe according to claim 1 or 2, characterized in that: the second displacement mechanism comprises a second limiting block (14) arranged on a second supporting rod (8), the second connecting rod (4) is located on the inner peripheral wall of the second sliding groove (11) and is provided with a second limiting groove, the second limiting groove is axially arranged along the second connecting rod (4) and is matched with the second limiting block (14), and the second limiting block (14) is arranged in the second limiting groove.