CN216715568U

CN216715568U - Composite damping sealing corrugated expansion device

Info

Publication number: CN216715568U
Application number: CN202123407010.1U
Authority: CN
Inventors: 洪磊; 彭琪; 曹广金; 洪亮; 尹明华; 王荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-10
Anticipated expiration: 2031-12-30

Abstract

The composite damping sealing corrugated expansion device comprises an inlet end pipe, an outlet end pipe, a middle connecting pipe and two damping sealing joints; each damping seal joint consists of a first transition pipe, a first corrugated pipe, an end ring, an outer shield, a corrugated pipe, a seal end ring, a second corrugated pipe, a second transition pipe and a flow guide pipe, wherein the flow guide pipe is arranged in the corrugated pipe, the outer pipe wall of the outlet end of the flow guide pipe is provided with a baffle ring, and sand-proof filler is filled between the flow guide pipe and the corrugated pipe; the first corrugated pipe is sleeved on the first transition pipe, the second corrugated pipe is sleeved on the second transition pipe, and two ends of the corrugated pipe are respectively connected with the first corrugated pipe and the second corrugated pipe; the first corrugated connecting pipe and the second corrugated connecting pipe are respectively provided with an end ring and a sealing end ring which are connected through an outer shield; the sealing end ring is internally provided with a plurality of damping sealing rings. The corrugated pipe has good damping, stability and sealing performance, can effectively reduce head loss, ensures that impurities in a medium are not deposited in the corrugated pipe in the operation process, and has long service life.

Description

Composite damping sealing corrugated expansion device

Technical Field

The utility model relates to a compensation device applied to pipelines in the hydropower and water conservancy industries, in particular to a combined type damping sealing corrugated expansion device.

Background

The pipeline of water and electricity, water conservancy trade generally all need install and use compensation arrangement in for the axial or radial displacement that the compensation pipeline produced because of expend with heat and contract with cold. The existing compensation device usually comprises a corrugated compensator, a telescopic joint and the like, and since the medium conveyed by a pipeline generally has certain temperature and pressure, the requirement on the compensation device is high, especially the requirement on the service life of the compensation device is high due to the fact that certain temperature and pressure medium is conveyed for a long time: not only must there be sufficient displacement compensation, but it must also have good sealing properties and a long service life.

As the pipeline in the water and electricity and water conservancy industries is usually a steel pipeline, the problem of expansion with heat and contraction with cold exists, the problem of pulsation of water flow in the pipeline also exists, and particularly the problem of pulsation generated by the water flow is particularly prominent in the pipeline with large diameter. When the conventional expansion joint is applied to a large-diameter steel pipe, the diameter of the middle section of the expansion joint is correspondingly large, so that the expansion joint has heavy self weight and is easy to resonate with water flow, and the fatigue life of a welding part of a corrugated pipe is shortened. Meanwhile, the fastener of the expansion joint can be self-loosened due to oxidation and corrosion after being used for a long time, so that the sealing performance of the expansion joint is reduced, corrosive impurities such as rainwater, soil, dust and sand and the like easily enter the outer side of the corrugated pipe, and the leakage probability of the corrugated pipe from the outer side due to corrosion is increased.

Disclosure of Invention

In order to solve the problems of the prior bellows expansion joint described in the background section, the utility model provides a composite damping sealing bellows expansion device.

The composite damping sealing corrugated expansion device comprises an inlet end pipe, an outlet end pipe, a middle connecting pipe, a first damping sealing joint and a second damping sealing joint, wherein the first damping sealing joint is arranged between the inlet end pipe and the middle connecting pipe; each damping seal joint consists of a first transition pipe, a first corrugated pipe, an end ring, an outer protective cover, a corrugated pipe, a seal end ring, a second corrugated pipe, a second transition pipe and a flow guide pipe, wherein the flow guide pipe is arranged in the corrugated pipe, a baffle ring is arranged on the outer pipe wall of the outlet end of the flow guide pipe, and sand-proof filler is filled between the flow guide pipe and the corrugated pipe; the first corrugated pipe is sleeved on the first transition pipe, the second corrugated pipe is sleeved on the second transition pipe, and two ends of the corrugated pipe are respectively connected with the first corrugated pipe and the second corrugated pipe; the first corrugated connecting pipe and the second corrugated connecting pipe are respectively provided with an end ring and a sealing end ring, and the end ring and the sealing end ring are connected through an outer shield; a plurality of annular sealing grooves are formed in the inner wall surface of the sealing end ring, and damping sealing rings are arranged in the sealing grooves at intervals; the first transition pipe of one group of damping sealing joints is sleeved on the inlet end pipe, the second transition pipe is sleeved on the middle connecting pipe, the inlet end of the flow guide pipe is connected with the inlet end pipe, and the outlet end of the flow guide pipe is arranged at intervals with the middle connecting pipe; the first transition pipe of the other group of damping sealing joints is sleeved on the middle connecting pipe, the second transition pipe is sleeved on the outlet end pipe, the inlet end of the flow guide pipe is connected with the middle connecting pipe, and the outlet end of the flow guide pipe is arranged at intervals with the outlet end pipe.

As a further improvement of the utility model, the device also comprises a first limiting device and a second limiting device, wherein the first limiting device and the second limiting device are both provided with a plurality of groups, each group of limiting devices consists of a pull rod and two lug plates, and the two lug plates are connected through the pull rod and corresponding fasteners; the two ear plates of each group of first limiting devices are respectively fixed on the inlet end pipe and the middle connecting pipe, and the two ear plates of each group of second limiting devices are respectively fixed on the middle connecting pipe and the outlet end pipe. The telescopic joint can fix the total length of a product in the transportation process through the limiting device, and the length of the telescopic joint can be adjusted through adjusting the limiting device during installation, so that the telescopic joint is more convenient to install.

The first limiting device and the second limiting device are uniformly distributed along the outer circumference of the telescopic joint, so that when the telescopic joint is horizontally placed, the telescopic joint body can be prevented from being in direct contact with the ground, the appearance integrity of a product is influenced, and the parallelism of the end surfaces of the connecting pipes at the two ends of the telescopic joint can be ensured.

As a further improvement, in order to further improve the shock absorption, stability and sealing performance of the damping sealing ring, and prolong the service life of the damping sealing ring, the annular sealing groove comprises a sealing groove with a circular section and a sealing groove with a rectangular section, the sealing grooves are arranged alternately, and a circular damping sealing ring and a rectangular damping sealing ring are respectively arranged in the sealing grooves. The damping sealing ring and the metal component form soft sealing, the sealing performance is far better than that of hard sealing, resonance and frictional resistance between metal parts can be reduced, and after resonance of the corrugated pipe and the metal component is reduced, the fatigue life of the corrugated pipe can be greatly prolonged, so that the service life of the expansion joint is prolonged.

The circular damping sealing ring and the rectangular damping sealing ring are both made of elastic materials. The elastic material can only realize effective sealing, and can also reduce the frictional resistance of the product, thereby reducing the head loss.

The sand-proof filler can be made of sponge, foam and the like, preferably polyurethane microporous elastomer which has good elasticity and large deformation, can absorb larger impact and vibration energy and has main physical properties superior to other foams or sponge materials with the same relative density, and is characterized by light weight, wear resistance, oil resistance and long service life.

The utility model has the following advantages and progresses:

1. has good shock absorption, stability and sealing performance, and the service life can reach more than 50 years.

2. The corrugated pipe structure vibration caused by low-speed fluid and the resistance to water flow generated in a flow area with sharply changed flow boundaries at the inlet and outlet of the pipeline, the variable cross-section pipeline, the joint of the pipeline and the like can be effectively reduced, and the service life of the corrugated expansion joint is further prolonged.

3. According to the utility model, elastic materials such as sponge, foam or polyurethane microporous elastomer and the like are filled between the corrugated pipe and the flow guide pipe, and the tail end of the flow guide pipe is isolated by the baffle ring, so that the design scheme can ensure that impurities in a medium cannot be deposited in the corrugated pipe in the operation process, thereby influencing the service life of the expansion joint.

4. When the utility model is applied to more complex pipelines, compared with the condition that a single expansion joint can only absorb axial displacement, the utility model can absorb transverse and radial displacement besides axial position, especially under the condition of sedimentation, and can better absorb the transverse or radial displacement of the pipeline caused by sedimentation. In addition, the composite expansion device can absorb more axial displacement than a single expansion joint, so the service life is longer.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged view of a portion (first damper seal joint) of fig. 1.

Fig. 3 is a schematic view of fig. 2 with a stop device added.

In fig. 1, → indicates a medium flow direction.

The reference numerals in fig. 1-3 correspond to the following components:

1-inlet end pipe, 2-first transition pipe, 3-first corrugated connecting pipe, 4-end ring, 5-outer shield, 6-corrugated pipe, 7-sand-proof filler, 8-sealing end ring, 9-second corrugated connecting pipe, 10-middle connecting pipe, 11-flow guide pipe, 12-retaining ring, 13-circular shock-absorbing sealing ring, 14-rectangular shock-absorbing sealing ring, 15-second transition pipe, 16-ear plate, 17-pull rod, 18-outlet end pipe.

Detailed Description

Referring to the drawings, the composite damping sealing corrugated expansion device of the present embodiment is composed of an inlet end pipe 1, an outlet end pipe 18, a middle connecting pipe 10, a first damping sealing joint, a second damping sealing joint, a first limiting device and a second limiting device. The first damping sealing joint is arranged between the inlet end pipe 1 and the middle connecting pipe 10, and the second damping sealing joint is arranged between the middle connecting pipe 10 and the outlet end pipe 18; each damping seal joint consists of a first transition pipe 2, a first corrugated pipe 3, an end ring 4, an outer shield 5, a corrugated pipe 6, a seal end ring 8, a second corrugated pipe 9, a second transition pipe 15 and a guide pipe 11, wherein the guide pipe 11 is arranged in the corrugated pipe 6, a baffle ring 12 is arranged on the outer pipe wall of the outlet end of the guide pipe 11, and sand-proof filler 7 is filled between the guide pipe 11 and the corrugated pipe 6; the first corrugated pipe 3 is sleeved on the first transition pipe 2, the second corrugated pipe 6 is sleeved on the second transition pipe 15, and two ends of the corrugated pipe 6 are respectively connected with the first corrugated pipe 3 and the second corrugated pipe 9; the first corrugated connecting pipe 3 and the second corrugated connecting pipe 9 are both provided with an end ring 4 and a sealing end ring 8, and the end ring 4 and the sealing end ring 8 are connected through an outer shield 5; the inner wall surface of the sealing end ring 8 is provided with a plurality of annular sealing grooves, each annular sealing groove comprises a sealing groove with a circular section and a sealing groove with a rectangular section, the sealing grooves are arranged alternately, circular damping sealing rings 13 and rectangular damping sealing rings 14 are respectively arranged in the sealing grooves, and the circular damping sealing rings 13 and the rectangular damping sealing rings 14 are made of elastic materials such as sponge, foam or polyurethane microporous elastomers.

A first transition pipe 2 of the first damping sealing joint is sleeved on the inlet end pipe 1, a second transition pipe 15 is sleeved on the middle connecting pipe 10, the inlet end of the flow guide pipe 11 is connected with the inlet end pipe 1, and the outlet end of the flow guide pipe is arranged at intervals with the middle connecting pipe 10; the first transition pipe 2 of the second damping sealing joint is sleeved on the middle connecting pipe 10, the second transition pipe 15 is sleeved on the outlet end pipe 18, the inlet end of the flow guide pipe 11 is connected with the middle connecting pipe 10, and the outlet end of the flow guide pipe is arranged at an interval with the outlet end pipe 18.

The first limiting devices and the second limiting devices are all multiple groups and are uniformly distributed along the outer circumference of the telescopic joint, each group of limiting devices consists of a pull rod 17 and two lug plates 16, and the two lug plates 16 are connected through the pull rod 27 and corresponding fasteners; wherein, two ear plates 16 of each group of first limiting devices are respectively fixed on the inlet end pipe 1 and the middle connecting pipe 10, and two ear plates 16 of each group of second limiting devices are respectively fixed on the middle connecting pipe 10 and the outlet end pipe 18.

Claims

1. The utility model provides a compound shock attenuation sealing ripple telescoping device which characterized in that: the damping sealing device comprises an inlet end pipe, an outlet end pipe, a middle connecting pipe, a first damping sealing joint and a second damping sealing joint, wherein the first damping sealing joint is arranged between the inlet end pipe and the middle connecting pipe; each damping seal joint consists of a first transition pipe, a first corrugated pipe, an end ring, an outer shield, a corrugated pipe, a seal end ring, a second corrugated pipe, a second transition pipe and a flow guide pipe, wherein the flow guide pipe is arranged in the corrugated pipe, a baffle ring is arranged on the outer pipe wall of the outlet end of the flow guide pipe, and sand-proof filler is filled between the flow guide pipe and the corrugated pipe; the first corrugated pipe is sleeved on the first transition pipe, the second corrugated pipe is sleeved on the second transition pipe, and two ends of the corrugated pipe are respectively connected with the first corrugated pipe and the second corrugated pipe; the first corrugated connecting pipe and the second corrugated connecting pipe are respectively provided with an end ring and a sealing end ring, and the end ring and the sealing end ring are connected through an outer shield; a plurality of annular sealing grooves are formed in the inner wall surface of the sealing end ring, and damping sealing rings are arranged in the sealing grooves at intervals; a first transition pipe of the first damping sealing joint is sleeved on the inlet end pipe, a second transition pipe is sleeved on the middle connecting pipe, the inlet end of the flow guide pipe is connected with the inlet end pipe, and the outlet end of the flow guide pipe is arranged at intervals with the middle connecting pipe; the first transition pipe of the second damping sealing joint is sleeved on the middle connecting pipe, the second transition pipe is sleeved on the outlet end pipe, the inlet end of the flow guide pipe is connected with the middle connecting pipe, and the outlet end of the flow guide pipe is arranged at intervals with the outlet end pipe.

2. The compound shock absorbing sealed bellows apparatus of claim 1, wherein: the device also comprises a first limiting device and a second limiting device, wherein the first limiting device and the second limiting device are respectively provided with a plurality of groups, each group of limiting devices consists of a pull rod and two lug plates, and the two lug plates are connected through the pull rod and corresponding fasteners; the two ear plates of each group of first limiting devices are respectively fixed on the inlet end pipe and the middle connecting pipe, and the two ear plates of each group of second limiting devices are respectively fixed on the middle connecting pipe and the outlet end pipe.

3. The compound shock absorbing sealed bellows apparatus of claim 2, wherein: the first limiting device and the second limiting device are uniformly distributed along the outer circumference of the telescopic joint.

4. The composite shock absorbing sealed bellows apparatus of claim 1, 2 or 3, wherein: the annular sealing groove comprises a sealing groove with a circular section and a sealing groove with a rectangular section, the sealing grooves are arranged alternately, and a circular damping sealing ring and a rectangular damping sealing ring are respectively arranged in the sealing grooves.

5. The compound shock absorbing sealed bellows apparatus of claim 4, wherein: the circular damping sealing ring and the rectangular damping sealing ring are made of elastic materials.