CN210266317U

CN210266317U - Pipeline expansion joint

Info

Publication number: CN210266317U
Application number: CN201921156394.4U
Authority: CN
Inventors: 杨金龙
Original assignee: Hebei Longsheng Pipeline Equipment Co Ltd
Current assignee: Hebei Longsheng Pipeline Equipment Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-07
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a pipeline expansion joint, including inner tube and outer tube, the inner tube stretches into to the outer tube in, the left end of outer tube is fixed and is provided with first ring flange, the left side detachable of first ring flange is provided with the clamping ring, the extrusion is provided with the sealing washer between clamping ring and the first ring flange, the inseparable laminating of sealing washer is on the inner tube, the fixed second ring flange that is provided with on the inner tube, detachable is provided with first spacing dish on the second ring flange, the fixed third ring flange that is provided with on the outer tube, the left side detachable of third ring flange is provided with the connecting sleeve, connecting sleeve's left side detachable is provided with the spacing dish of second, the middle part of the spacing dish of second is provided with first through-hole, the right side of the. The utility model adopts a flexible limit structure, avoids direct rigid collision, reduces the internal impact force, prolongs the service life and ensures the long sealing performance of the whole body; wholly adopt split type structure, the dismouting of being convenient for does benefit to operating personnel's construction.

Description

Pipeline expansion joint

Technical Field

The utility model relates to a pipe connection connects the field, especially relates to a pipeline expansion joint.

Background

The expansion joint is also called as an expansion joint, an expansion joint and a compensator, can axially expand and contract within a certain range and is used for compensating axial displacement generated by reasons such as expansion caused by heat and contraction caused by cold in the use process of the pipeline or absorbing the vibration of equipment, reducing the influence of the vibration of the equipment on the pipeline and absorbing the deformation of the pipeline caused by earthquake and ground subsidence, thereby ensuring that the pipeline cannot be broken under various special conditions.

The traditional expansion joint comprises an inner pipe and an outer pipe which are mutually inserted, a sealing gasket is arranged between the inner pipe and the outer pipe, when the pipeline generates axial displacement, the inner pipe and the outer pipe carry out axial relative movement, and the whole sealing performance is always kept under the action of the sealing gasket, the general expansion joint ensures that the expansion joint cannot be separated from the outer pipe in the moving process by increasing the distance of the inner pipe inserted into the outer pipe, when the structure is installed, a safety value is generally obtained by calculation in advance, and further specific installation work is carried out, but in case of an accident, because a reliable limit structure is not arranged between the inner pipe and the outer pipe, serious leakage accidents can occur when the inner pipe is separated from the outer pipe, and the structure is very troublesome, so that each manufacturer improves the traditional expansion joint later, and a limit structure is additionally arranged between the inner pipe and the outer pipe, however, the existing limiting structures are in rigid limiting modes, when impact occurs, large stress can be generated inside the limiting structures, the service life is influenced, and the existing limiting structures also have the defects of inconvenience in installation, poor adjustability and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to avoid prior art's weak point, provide a pipeline expansion joint to effectively solve the weak point that exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a pipeline expansion joint comprises an inner pipe and an outer pipe, the right side of the inner pipe extends into the outer pipe, a first flange plate is fixedly arranged at the left end of the outer pipe, a press ring is detachably arranged at the left side of the first flange plate through a first screw, a seal ring is extruded between the press ring and the first flange plate and is tightly attached to the inner pipe, a second flange is fixedly arranged on the inner pipe, a first limiting disc is detachably arranged on the second flange through a second screw, a third flange plate is fixedly arranged on the outer pipe, a connecting sleeve is detachably arranged on the left side of the third flange plate through a third screw, the left end of the connecting sleeve extends to the left side of the first limiting plate, a second limiting disc is detachably arranged on the left side of the connecting sleeve through a fourth screw, a first through hole is formed in the middle of the second limiting disc, and the inner diameter of the first through hole is larger than the outer diameter of the second flange plate;

and a buffer structure is arranged on the right side of the second limiting disc.

Furthermore, the first flange plate is fixedly connected with the outer pipe in a welding mode.

Furthermore, the second flange plate is fixedly connected with the inner pipe in a welding mode.

Further, the third flange plate is fixedly connected with the outer pipe in a welding mode.

Furthermore, a limiting ring corresponding to the position of the buffer structure is fixedly arranged on the left side of the first limiting disc.

Furthermore, the right side of the first limiting disc is fixedly provided with a cushion pad corresponding to the position of the pressing ring.

Further, buffer structure includes the buffer disc, the buffer disc pass through the spring with the spacing dish of second is connected, and the middle part of buffer disc is provided with the second through-hole, and the internal diameter of second through-hole is greater than the external diameter of second ring flange.

Furthermore, the two ends of the spring are respectively connected with the second limiting disc and the buffer disc in a welding mode.

Furthermore, the connecting sleeve comprises a left connecting sleeve and a right connecting sleeve, and the left connecting sleeve is connected with the right connecting sleeve through an adjusting screw rod and an adjusting nut.

The above technical scheme of the utility model following beneficial effect has: the utility model adopts a flexible limit structure, avoids direct rigid collision, reduces the internal impact force, prolongs the service life and ensures the long sealing performance of the whole body; and the whole body adopts a split structure, so that the disassembly and the assembly are convenient, and the construction of operators is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

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

fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, the telescopic joint for a pipeline according to this embodiment includes an inner pipe 1 and an outer pipe 2, a right side of the inner pipe 1 extends into the outer pipe 2, a first flange 3 is fixed at a left end of the outer pipe 2, a press ring 5 is detachably disposed at a left side of the first flange 3 through a first screw 4, a seal ring 6 is disposed between the press ring 5 and the first flange 3 in a pressing manner, the seal ring 6 is tightly attached to the inner pipe 1, so that in a process that the inner pipe 1 slides relative to the outer pipe, the seal ring 6 is tightly attached to the inner pipe 1 all the time to form a seal, thereby preventing leakage and realizing compensation of axial displacement, a second flange 20 is fixedly disposed on the inner pipe 1, a first limiting disc 8 is detachably disposed on the second flange 20 through a second screw 7, wherein the second flange 20 is provided with a screw through hole in cooperation with the second, the cooperation second screw 7 is provided with the screw hole on the first spacing dish 8, the fixed third flange dish 9 that is provided with on outer tube 2, the left side of third flange dish 9 is provided with connecting sleeve 11 through third screw 10 detachable, connecting sleeve 11's left end extends to the left side of first spacing dish 8, and connecting sleeve 11's left side is provided with the spacing dish 13 of second through fourth screw 12 detachable, the middle part of the spacing dish 13 of second is provided with first through-hole 13a, first through-hole 13 a's internal diameter is greater than the external diameter of second flange dish 20.

The first flange plate 3 is fixedly connected with the outer pipe 2 in a welding mode, the second flange plate 20 is fixedly connected with the inner pipe 1 in a welding mode, and the third flange plate 9 is fixedly connected with the outer pipe 2 in a welding mode.

The left side of the first limiting disc 8 is fixedly provided with a limiting ring 14 corresponding to the position of the buffer structure, the limiting ring 14 is connected with the first limiting disc 8 in a welding mode, or the limiting ring 14 and the first limiting disc 8 are of an integrally cast structure.

The right side of first spacing dish 8 is fixed to be provided with 5 position corresponding blotters 15 of clamping ring, can set up the draw-in groove that is used for installing blotters 15 on the first spacing dish 8.

The right side of the second limiting disc 13 is provided with a buffer structure, the buffer structure comprises a buffer disc 16, the buffer disc 16 is connected with the second limiting disc 13 through a spring 17, a second through hole 16a is formed in the middle of the buffer disc 16, the inner diameter of the second through hole 16a is larger than the outer diameter of the second flange plate 20, and two ends of the spring 17 are respectively connected with the second limiting disc 13 and the buffer disc 16 in a welded mode.

In addition, as shown in fig. 3, in the second embodiment, the connection sleeve 11 includes a left connection sleeve 11a and a right connection sleeve 11b, the left connection sleeve 11a and the right connection sleeve 11b are connected through an adjustment screw 18 and an adjustment nut 19, and the adjustment of the overall axial dimension of the connection sleeve 11 is realized by adjusting the position of the adjustment nut 19, so as to realize the adjustment of the maximum movable range of the inner tube 1, so as to meet the actual requirement.

In the in-process of using, when inner tube 1 moves right extreme position for outer tube 2, first spacing dish 8 supports and leans on clamping ring 5, play spacing effect, and blotter 15 plays the effect of buffering, when inner tube 1 moves left extreme position for outer tube 2 left, first spacing dish 8 and the contact of buffer disk 16, play spacing effect, avoid inner tube 1 to break away from the outer tube, and spring 17 plays the effect of buffering, avoid taking place direct rigid collision, reduce inside impact, prolonged service life, guarantee whole permanent leakproofness.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a pipeline expansion joint, includes inner tube and outer tube, the right side of inner tube stretches into to the outer tube in, the left end of outer tube is fixed and is provided with first ring flange, and the left side of first ring flange is provided with the clamping ring through first screw detachable, the clamping ring with the extrusion is provided with the sealing washer between the first ring flange, and the inseparable laminating of sealing washer is in on the inner tube, its characterized in that: a second flange plate is fixedly arranged on the inner pipe, a first limiting plate is detachably arranged on the second flange plate through a second screw, a third flange plate is fixedly arranged on the outer pipe, a connecting sleeve is detachably arranged on the left side of the third flange plate through a third screw, the left end of the connecting sleeve extends to the left side of the first limiting plate, a second limiting plate is detachably arranged on the left side of the connecting sleeve through a fourth screw, a first through hole is formed in the middle of the second limiting plate, and the inner diameter of the first through hole is larger than the outer diameter of the second flange plate;

2. The pipe expansion joint of claim 1, wherein: the first flange plate is fixedly connected with the outer pipe in a welding mode.

3. The pipe expansion joint of claim 1, wherein: the second flange plate is fixedly connected with the inner pipe in a welding mode.

4. The pipe expansion joint of claim 1, wherein: and the third flange plate is fixedly connected with the outer pipe in a welding mode.

5. The pipe expansion joint of claim 1, wherein: and a limiting ring corresponding to the position of the buffer structure is fixedly arranged on the left side of the first limiting disc.

6. The pipe expansion joint of claim 1, wherein: the right side of the first limiting disc is fixedly provided with a cushion pad corresponding to the position of the pressing ring.

7. The pipe expansion joint of claim 1, wherein: the buffer structure comprises a buffer disc, the buffer disc is connected with the second limiting disc through a spring, a second through hole is formed in the middle of the buffer disc, and the inner diameter of the second through hole is larger than the outer diameter of the second flange plate.

8. The pipe expansion joint of claim 7, wherein: and two ends of the spring are respectively connected with the second limiting disc and the buffer disc in a welding manner.

9. The pipe expansion joint of claim 1, wherein: the connecting sleeve comprises a left connecting sleeve and a right connecting sleeve, and the left connecting sleeve is connected with the right connecting sleeve through an adjusting screw rod and an adjusting nut.