CN105065818B - Flexible damping connection device for ground petroleum pipeline - Google Patents

Abstract

The invention provides a flexible damping connection device for a ground petroleum pipeline; the device mainly comprises a pipe A, a flexible damper and a pipe B; an external thread is arranged in a joint of the pipe A and the pipe B; internal threads are arranged at the two ends of the flexible damper; and the flexible damper is connected with the pipe A and the pipe B. The device is characterized by using the flexible damper for reducing the vibration, absorbing the vibration and isolating the vibration energy transfer. The device realizes the convenience for installation and fixation and the fluid sealing through the thread design of the pipes and the flexible damper; the primary damping of the connected pipes is realized through a spring damping area of double springs; the isolation of vibration energy transfer is realized through a rubber damping area filled with high-viscoelasticity damping rubbers; and the absorption of residual vibration energy of the spring damping area and the rubber damping area is realized through a gas damping area filled with compressed gas.

Description

A flexible vibration-absorbing connection device for above-ground oil pipelines

technical field

The invention relates to a flexible damping connection device for above-ground petroleum pipelines, in particular to a thread design of the pipeline and the flexible damper to facilitate installation, fixation and fluid sealing; the connection is realized through the spring damping area of double springs The initial vibration reduction of the pipeline; the transmission of vibration energy is isolated through the rubber vibration-absorbing area injected with viscoelastic high-damping rubber; the residual vibration of the spring vibration-absorbing area and the rubber vibration-absorbing area is absorbed through the gas vibration-absorbing area filled with compressed gas Energy belongs to the field of research and development of vibration reduction technology for pipeline connections.

Background technique

At present, the connection of above-ground oil pipelines is mainly realized through rigid connections such as welding or flanges, but the rigid connection has the disadvantage of easily transmitting vibration loads, which can easily cause damage to the pipelines, and misalignment of the two connecting pipes at the interface, and even cause internal damage. Fluid leakage, because the oil pipeline on the ground is on the surface of the ground, even a small leakage will cause a large pollution accident. However, if the harmful vibration can be eliminated before being transmitted to the connected pipeline, the connected pipeline can be effectively protected and the relative displacement of the two pipelines can be prevented.

Therefore, in view of the problem that the rigid connection of the existing above-ground oil pipeline is easy to transmit harmful vibration, a connection device that replaces the rigid connection of the pipeline should be designed from the comprehensive consideration of the pipeline connection method and structure.

Contents of the invention

Aiming at the problem that the rigid connection of the existing above-ground oil pipeline is easy to transmit harmful vibrations, the invention provides a flexible vibration-eliminating connection device for the above-ground oil pipeline that can effectively solve the above-mentioned problem.

A flexible vibration-absorbing connection device for above-ground petroleum pipelines of the present invention adopts the following technical solutions:

A flexible vibration-absorbing connection device for above-ground petroleum pipelines, mainly comprising a pipeline A, a flexible vibration absorber and a pipeline B, the interface between the pipeline A and the pipeline B is provided with external threads, and the two ends of the flexible vibration absorber are provided with internal threads. The flexible damper connects the pipeline A and the pipeline B; the flexible damper is mainly composed of an upper thin tube, a lower thin tube and a sealing sheet, the upper thin tube is a cylindrical structure, and the lower thin tube is a "duplex" "Cylindrical structure with a cross-section, the sealing plate is a circular structure, and the sealing plate is provided with threaded holes in the form of three layers of radiation. There are 12 threaded holes in each layer. The gasket is installed on two sealing sheets. The space area surrounded by the upper thin tube, the lower thin tube and the sealing sheet is divided into a spring vibration-absorbing area, a rubber vibration-absorbing area and a gas vibration-absorbing area. The spring vibration-absorbing area is in The two ends of the flexible damper are in direct contact with pipe A and pipe B. The rubber damping area is between the two spring damping areas, and the gas damping area is distributed outside the flexible damper, covering the entire spring damping area. and rubber vibration damping area; the spring vibration damping area is surrounded by the lower thin tube and the sealing sheet, and two springs are installed at the section of a single spring damping area, and 8 sets of spring vibration damping are respectively equipped at both ends of the entire flexible damper The rubber damping area is composed of the middle area inside the lower thin tube. The rubber damping area is filled with elastic damping. The elastic damping is viscoelastic high damping rubber. The rubber damping area is sealed by an inverted tapered sealing plug; The gas vibration elimination area is surrounded by the upper thin tube, the outer surface of the lower thin tube and the sealing sheet. The gas vibration elimination area is filled with compressed gas and sealed by the sealing bolt and the gasket in the middle of the upper thin tube.

In the present invention, external threads are provided at the interface of pipeline A and pipeline B, and internal threads are provided at both ends of the flexible damper. This design facilitates the installation and fixing of the flexible damper, and realizes the sealing of the fluid in the pipe through threaded connection. .

In the present invention, a spring damping area with double springs is designed on the inside of both ends of the flexible damper. Through this design, the initial damping of the pipeline connection is realized, that is, when the pipeline A vibrates, the pipeline is compressed and deformed by the spring. A's vibration kinetic energy is converted into elastic potential energy to convert and consume vibration energy.

In the present invention, the inner middle part of the flexible damper is designed as a rubber damping area filled with viscoelastic high damping rubber. Through this design, the transmission of vibration energy is isolated, that is, the viscous internal friction between rubber molecular chains is used to consume vibration energy. The residual vibration energy transmitted from the spring damping area, and the absorption of vibration energy is realized through the local deformation of elastic damping.

In the present invention, the outside of the flexible damper is designed as a gas damping area filled with compressed gas. Through this design, the vibration and deformation buffering of the spring damping area and the rubber damping area is realized, that is, an air cushion is formed with compressed gas, and the air cushion is passed through the gas. The compression absorbs the residual vibration energy from the spring damping area and the rubber damping area, so as to realize the quick damping and damping of the flexible damper.

The beneficial effects of the present invention are: through the thread design of the pipeline and the flexible damper, it is easy to install, fix and fluid seal; through the spring damping area of the double spring, the initial vibration reduction of the connected pipeline is realized; through the injection of viscoelastic high damping rubber The rubber vibration damping area realizes the transmission of isolated vibration energy; the gas damping area filled with compressed gas realizes the absorption of the residual vibration energy of the spring vibration damping area and the rubber vibration damping area.

Description of drawings

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

Fig. 2 is a partially enlarged schematic view of the flexible damper of the present invention.

Fig. 3 is a schematic diagram of the layout of the spring damping area of the present invention.

Fig. 4 is a partially enlarged schematic view of the damping area of the spring of the present invention.

Fig. 5 is a partially enlarged schematic view of the gas vibration-eliminating area and its sealing part of the present invention.

Among them: 1. Pipe A, 2. Flexible damper, 3. Pipe B, 4. Lower thin tube, 5. Rubber damping area, 6. Elastic damping, 7. Spring damping area, 8. Fastening screws, 9. Spring, 10. Sealing thin plate, 11. Upper thin tube, 12. Compressed gas, 13 Gas damping area, 14. Sealing bolt, 15. Sealing plug, 16. Gasket.

detailed description

Example:

As shown in Fig. 1, a kind of flexible damping connecting device used for above-ground petroleum pipeline of the present invention mainly comprises pipeline A1, flexible damper 2 and pipeline B3, and the interface of pipeline A1 and pipeline B3 is provided with There are external threads, and both ends of the flexible damper 2 are provided with internal threads, and the flexible damper 2 is connected to the pipe A 1 and the pipe B 3. This thread design is convenient for the installation and fixing of the flexible damper 2, and it can be realized through threaded connection. The sealing of the fluid in the tube.

As shown in Figure 2 and Figure 3, the flexible damper 2 is mainly composed of an upper thin tube 11, a lower thin tube 4 and a sealing sheet 10, the upper thin tube 11 is a cylindrical structure, and the lower thin tube 4 is a "duplex" "Cylindrical structure with a cross-section, the sealing sheet 10 is a circular structure, the sealing sheet 10 is provided with threaded holes in the form of three layers of radiation, and each layer has 12 threaded holes, and the upper thin tube 11 and the lower thin tube 4 pass through Fasten the screw 8 and the sealing gasket 16 to install it on the two sealing sheets 10, and the space area surrounded by the upper thin tube 11, the lower thin tube 4 and the sealing sheet 10 is divided into a spring vibration-absorbing area 7 and a rubber vibration-absorbing area. 5 and the gas damping area 13, the spring damping area 7 is inside the two ends of the flexible damper 2 and is in direct contact with the pipe A1 and the pipe B3, the rubber damping area 5 is between the two spring damping areas 7, The gas damping area 13 is distributed on the outside of the flexible damper 2 and covers the entire spring damping area 7 and the rubber damping area 5 .

As shown in Figure 2 and Figure 4, the spring damping area 7 is surrounded by the lower thin tube 4 and the sealing sheet 10, and two springs 9 are installed at the section of a single spring damping area 7, and the two ends of the entire flexible damper 2 are respectively Equipped with 8 sets of spring damping zones 7. The spring damping area 7 of the double spring 9 realizes the initial vibration reduction at the joint of the pipeline during operation, that is, when the pipeline A 1 vibrates, the vibration kinetic energy of the pipeline A 1 is converted into elastic potential energy for vibration energy through the compression deformation of the spring 9 transformation and consumption.

As shown in Figure 2, the rubber damping area 5 is composed of the middle area inside the lower thin tube 4, the rubber damping area 5 is filled with elastic damping 6, the elastic damping 6 is viscoelastic high damping rubber, and the rubber damping area 5 passes through Inverted tapered sealing plug 15 is sealed. The rubber vibration-absorbing area 5 injected with viscoelastic high-damping rubber can isolate the transmission of vibration energy during operation, that is, the residual vibration energy transmitted through the spring vibration-absorbing area 7 is consumed through the viscous internal friction between rubber molecular chains, and Absorption of the vibration energy is achieved by local deformation of the elastic damper 6 .

As shown in Figure 2 and Figure 5, the gas damping area 13 is surrounded by the upper thin tube 11, the outer surface of the lower thin tube 4 and the sealing sheet 10, the gas damping area 13 is filled with compressed gas 12, and passes through the upper thin tube The sealing bolt 14 and the gasket 16 in the middle of 11 are sealed. The gas damping area 13 filled with compressed gas 12 realizes the vibration and deformation buffering of the spring damping area 7 and the rubber damping area 5 during operation, that is, the compressed gas 12 forms an air cushion and absorbs the vibration from the spring damping area through the compression of the gas. 7 and the residual vibration energy of the rubber damping area 5, so as to realize the quick damping and vibration elimination of the flexible damper 2.

Claims (1)

1. A flexible vibration-absorbing connection device for above-ground petroleum pipelines, mainly including pipeline A, flexible vibration absorber and pipeline B, the interface between pipeline A and pipeline B is provided with external threads, and the two ends of the flexible vibration absorber are provided with There are internal threads, and the flexible damper connects the pipeline A and the pipeline B. It is characterized in that: the flexible damper is mainly composed of an upper thin tube, a lower thin tube and a sealing sheet, the upper thin tube is a cylindrical structure, and the lower thin tube The barrel is a cylindrical structure with a "duplex" cross-section, and the sealing sheet is a circular structure. The sealing sheet has threaded holes in the form of three layers of radiation. There are 12 threaded holes in each layer. The upper thin barrel and the lower thin The cylinder is installed on two sealing sheets by fastening screws and sealing gaskets. The space area surrounded by the upper thin cylinder, the lower thin cylinder and the sealing sheet is divided into a spring damping area, a rubber damping area and a gas damping area. , the spring damping area is inside the two ends of the flexible damper and is in direct contact with pipe A and pipe B, the rubber damping area is between the two spring damping areas, and the gas damping area is distributed outside the flexible damper, Covers the entire spring damping area and rubber damping area; the spring damping area is surrounded by a lower thin tube and a thin sealing plate, two springs are installed at the section of a single spring damping area, and the two ends of the entire flexible damper are equipped with There are 8 sets of spring damping areas; the rubber damping area is composed of the middle area inside the lower thin tube. The rubber damping area is filled with elastic damping. The elastic damping is viscoelastic high damping rubber. The rubber damping area passes through the inverted cone Sealed with a shaped sealing plug; the gas damping area is surrounded by the upper thin tube, the outer surface of the lower thin tube and the sealing sheet, and the gas damping area is filled with compressed gas, and is sealed by the sealing bolt and the gasket in the middle of the upper thin tube .