Large-stroke pipeline expansion piece

Abstract

The large-stroke pipeline expansion piece comprises a first end pipe and a second end pipe, an expansion section is arranged on the outer pipe wall of the end, facing the second end pipe, of the first end pipe, the inner pipe wall of the second end pipe comprises a guide section and a limiting section, and the limiting section is located at the end, facing the first end pipe, of the second end pipe. The inner diameter of the guide section is larger than that of the guide section; the outer diameter of the telescopic section is matched with the inner diameter of the guide section, the telescopic section is matched in the guide section in a telescopic mode, and a sealing ring matched with the telescopic section in a sealing mode is arranged in the guide section. The end, facing the first end pipe, of the second end pipe is detachably connected with a limiting plug, the limiting plug comprises an arc-shaped plug block, the inner diameter of the plug block is matched with the outer diameter of the telescopic section, and the plug block is arranged between the limiting section and the telescopic section in a plugged mode. The telescopic section is provided with a protruding limiting block. The utility model has the advantages of compact structure, convenience in assembly, good structural stability, easiness in construction and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline expansion devices, in particular to a large-stroke pipeline expansion device. Background Art

[0002] The expansion joint is also called the expansion joint, expansion joint, and compensator. The expansion joint can be axially expanded and contracted within a certain range. It is used to compensate for the axial displacement caused by thermal expansion and contraction during the use of the pipeline, or absorb equipment vibration, reduce the impact of equipment vibration on the pipeline, and absorb the deformation of the pipeline caused by earthquakes and ground subsidence, so as to ensure that the pipeline will not break under various special circumstances. The expansion joint includes an inner tube and an outer tube that are plugged into each other. A sealing gasket is arranged between the inner tube and the outer tube. When the pipeline is axially displaced, the inner tube and the outer tube move axially relative to each other, and under the action of the sealing gasket, the overall sealing is always maintained. In order to prevent the inner tube from falling off from the outer tube, some expansion joints will connect the limit rod between the flanges of the inner tube and the outer tube. The limit rod is located on the outside of the tube body. The installation space of the limit rod needs to be considered during the construction process, and the limit rod is easy to bend during the installation process, which affects the guiding role of the limit rod. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: how to provide a large-stroke pipeline expansion joint with compact structure, convenient assembly, good structural stability and easy construction.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A long-stroke pipeline expander, characterized in that it includes a first end tube and a second end tube, and the ends of the first end tube and the second end tube opposite to each other are both provided with a connecting flange; the first end tube has a telescopic section on the outer tube wall of one end facing the second end tube, and the inner tube wall of the second end tube includes a guide section and a limit section, the limit section is located at the end of the second end tube facing the first end tube, and the inner diameter is larger than the inner diameter of the guide section; the outer diameter of the telescopic section matches the inner diameter of the guide section, and can be telescopically fitted in the guide section, and the guide section has a sealing ring that is sealed with the telescopic section; the second end tube is detachably connected to a limit plug at one end facing the first end tube, the limit plug includes a plug block in the shape of an arc, the inner diameter of the plug block matches the outer diameter of the telescopic section, and is plugged between the limit section and the telescopic section; the telescopic section has a protruding limit block, and the limit block is located between the limit plug and the guide section.

[0006] In the above structure, the stopper plug detachably connected to the second end tube allows the stopper block on the telescopic section to be located between the stopper plug and the guide section, thereby preventing the telescopic section from falling off from the guide section. Since the stopper plug is connected to the second end tube and is disposed between the telescopic section and the stopper plug, the stopper plug is closer to the pipeline, making the overall structure more compact and having better structural stability.

[0007] Furthermore, at least one intermediate tube is connected between the first end tube and the second end tube, the intermediate tube has the telescopic section on the outer tube wall at one end facing the second end tube, and the guide section and the limit section are provided on the inner tube wall at the other end, and the limit plug is detachably connected to the end of the intermediate tube facing the first end tube.

[0008] In this way, by providing an intermediate tube and telescopically connecting the intermediate tube with the first end tube and the second end tube, the telescopic length of the overall telescope can be increased.

[0009] Furthermore, the limiting section has a flange at one end facing the first end tube, the limiting plug has a connecting plate formed to protrude radially, the connecting plate has bolt holes set through it, and is connected to the flange by bolts.

[0010] Furthermore, the limiting plug is semicircular and two of them are symmetrically arranged.

[0011] Furthermore, the limit block extends into a ring shape along the circumference of the telescopic section.

[0012] In summary, the utility model has the advantages of compact structure, convenient assembly, good structural stability, easy construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of this embodiment. DETAILED DESCRIPTION

[0014] The utility model is further described in detail below in conjunction with the embodiments.

[0015] When implementing: Figure 1As shown, a long-stroke pipeline expander comprises a first end tube 1 and a second end tube 2, wherein the ends of the first end tube 1 and the second end tube 2 opposite to each other are both provided with connecting flanges; an expansion section 3 is provided on the outer tube wall of the end of the first end tube 1 facing the second end tube 2, and the inner tube wall of the second end tube 2 comprises a guide section 4 and a limit section 5, wherein the limit section 5 is located at the end of the second end tube 2 facing the first end tube 1, and the inner diameter of the limit section 5 is larger than the inner diameter of the guide section 4; the outer diameter of the expansion section 3 matches the inner diameter of the guide section 4, and can be telescopically matched In the guide section 4, there is a sealing ring that seals with the telescopic section 3; the second end tube 2 is detachably connected to a limiting plug 6 at one end toward the first end tube 1, and the limiting plug 6 includes an arc-shaped plug block, the inner diameter of the plug block matches the outer diameter of the telescopic section 3, and is plugged between the limiting section 5 and the telescopic section 3; the telescopic section 3 is provided with a protruding limiting block 7, and the limiting block 7 extends in a ring shape along the circumference of the telescopic section 3 and is located between the limiting plug 6 and the guide section 4.

[0016] In order to increase the telescopic size, in this embodiment, at least one intermediate tube 8 is connected between the first end tube 1 and the second end tube 2, and the intermediate tube 8 has the telescopic section 3 on the outer tube wall at one end facing the second end tube 2, and the guide section 4 and the limit section 5 are provided on the inner tube wall at the other end, and the intermediate tube 8 is detachably connected to the limit plug 6 at one end facing the first end tube 1.

[0017] The end of the limiting section 5 facing the first end tube 1 has a flange, and the limiting plug 6 has a connecting plate protruding in the radial direction, and the connecting plate has bolt holes extending therethrough and connected to the flange by bolts. Specifically, the limiting plug 6 is semicircular and symmetrically provided with two.

[0018] In the above structure, the stopper plug detachably connected to the second end tube allows the stopper block on the telescopic section to be located between the stopper plug and the guide section, thereby preventing the telescopic section from falling off from the guide section. Since the stopper plug is connected to the second end tube and is disposed between the telescopic section and the stopper plug, the stopper plug is closer to the pipeline, making the overall structure more compact and having better structural stability.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A long-stroke pipeline expansion joint, characterized in that: The invention comprises a first end tube (1) and a second end tube (2), wherein the ends of the first end tube (1) and the second end tube (2) facing each other are both provided with connecting flanges; an outer tube wall of the end of the first end tube (1) facing the second end tube (2) is provided with a telescopic section (3); an inner tube wall of the second end tube (2) comprises a guide section (4) and a limit section (5); the limit section (5) is located at the end of the second end tube (2) facing the first end tube (1) and has an inner diameter greater than the inner diameter of the guide section (4); the outer diameter of the telescopic section (3) matches the inner diameter of the guide section (4) and is telescopic. The guide section (4) is provided with a sealing ring which is in sealing engagement with the telescopic section (3); the second end tube (2) is detachably connected to a limit stopper (6) at one end facing the first end tube (1); the limit stopper (6) comprises an arc-shaped stopper block, the inner diameter of which matches the outer diameter of the telescopic section (3), and is arranged between the limit stopper (5) and the telescopic section (3); the telescopic section (3) is provided with a protruding limit stopper (7), and the limit stopper (7) is located between the limit stopper (6) and the guide section (4).

2. The long-stroke pipeline expansion joint according to claim 1, characterized in that: At least one intermediate tube (8) is connected between the first end tube (1) and the second end tube (2); the intermediate tube (8) has the telescopic section (3) on its outer tube wall at one end facing the second end tube (2); the guide section (4) and the limit section (5) are arranged on its inner tube wall at the other end; and the limit plug (6) is detachably connected to one end of the intermediate tube (8) facing the first end tube (1).

3. The long-stroke pipeline expansion joint according to claim 1 or 2, characterized in that: The end of the limiting section (5) facing the first end tube (1) has a flange, and the limiting plug (6) has a connecting plate protruding in the radial direction, the connecting plate has bolt holes extending therethrough and is connected to the flange by bolts.

4. The long-stroke pipeline expansion joint according to claim 3, characterized in that: The limiting plugs (6) are semicircular in shape and two are symmetrically arranged.

5. The long-stroke pipeline expansion joint according to claim 3, characterized in that: The limiting block (7) extends in a ring shape along the circumference of the telescopic section (3).

Images