CN210318966U

CN210318966U - Flexible pipeline interface and force-dissipating pipeline

Info

Publication number: CN210318966U
Application number: CN201920776984.0U
Authority: CN
Inventors: 程思哲; 程金煦
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-04-14
Anticipated expiration: 2029-05-27

Abstract

The utility model discloses a flexible pipeline interface and pipeline of doing all can disappears belongs to the pipeline field, including holding the head and pegging graft the plug in holding the head, the plug with hold and be equipped with flexible force transmission structure between the head, flexible force transmission structure includes: the force transmission cavity is formed by enclosing the inner wall of the bearing head and the outer wall of the plug; the elastic force transmission ring is limited in the force transmission cavity to transmit acting force, so that the plug and the socket can generate axial displacement and a swing angle but cannot be pulled off; when the acting force is transmitted, the force transmission rings are all subjected to surface stress. The utility model discloses the biography power ring of doing is the face atress when transmission effort, and not the line contact atress, and consequently the transmission of power is comparatively abundant, firm, also is difficult for taking place the incident that the biography power ring deviates from, through the pipeline of losing power of this kind of flexible pipeline interface formation, when forming a plurality of axial skew and axial displacement, can effectively eliminate or reduce the stress of pipeline.

Description

Flexible pipeline interface and force-dissipating pipeline

Technical Field

The utility model relates to a pipeline field especially relates to a flexible pipeline interface and pipeline of doing all can disappears.

Background art;

the pipeline conveying is the most convenient and most efficient medium conveying mode, water supply and drainage of people life, water and gas conveying of industrial production all depend on the pipeline to carry, and the pipeline is the life line of city safety, reduces the explosion and leakage accident of pipeline, improves the safe reliability of pipeline operation, is the first problem of building modernized metropolitan cities.

At present, the applied rigid connecting pipeline and flexible connecting pipeline are safe in structure, but in use, the pipeline bears various stresses such as temperature difference stress, bending stress formed by uneven settlement of a foundation, shearing force generated by ground load of the pipeline and the like, and once the comprehensive stress of damage exceeds the allowable stress of the pipeline, the pipeline can be exploded and leaked. Therefore, developing a pipeline that eliminates or reduces the stress to which the pipeline is subjected is the most fundamental method for improving the safety and reliability of the pipeline.

CN 107061902 discloses a pulling-resistant flexible pipe joint, which can effectively prevent the pulling-off of the plug and the socket. However, the applicant finds that the bottom surface forming the bayonet concave part in the technology is in the shape of two arc surfaces, and no matter the clamping ring with the cross section being in a similar circle or a square is clamped in and then is in line contact with the supporting protrusion, when the interface structure bears axial force and radial force simultaneously, the clamping ring can rotate clockwise and has a chance to slide out of the inner port. That is, if two adjacent pipes are bent and dislocated in the radial direction, the connection between the two pipes is unstable, which brings about a very large safety accident.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a flexible pipeline interface can make the connection of holding head, plug more firm to can make the pipeline become the pipeline of eliminating effort, effectively improve the fail safe nature of pipeline.

The utility model adopts the technical proposal that:

the utility model provides a flexible pipeline interface, includes the socket and pegs graft the plug in the socket, is equipped with flexible biography power structure between plug and the socket, flexible biography power structure includes:

the force transmission cavity is formed by enclosing the inner wall of the bearing head and the outer wall of the plug;

the elastic force transmission ring is limited in the force transmission cavity to transmit acting force, so that the plug and the socket can generate axial displacement and a swing angle but cannot be pulled off;

when the acting force is transmitted, the force transmission rings are all subjected to surface stress.

As a further improvement of the present invention, the acting force includes an axial shearing force and/or a radial pressure.

As a further improvement, the plug outer wall is equipped with step portion, step portion includes towards the vertical plane of holding the first tip inserted hole to and connect vertical planar face of cylinder perpendicularly, the internal diameter of ring inner anchor ring slightly is greater than the external diameter on face of cylinder, and the internal anchor ring is with the axle center with holding the first internal control.

As a further improvement of the utility model, the width of the cylindrical surface is larger than that of the inner ring surface.

As the utility model discloses a further improvement, the front end of biography power ring is equipped with first shear force plane, and first shear force plane can form the face contact and transmit the shearing force with vertical plane.

As a further improvement, the socket end is provided with the pipe buckle that extends to the axis direction, the rear end of biography power ring is equipped with second shear force plane, second shear force plane can form the face contact and transmit the shearing force with the inner wall of pipe buckle.

As a further improvement, the outer peripheral surface butt of the force transmission ring bears the head inner wall, and the force transmission ring is in a radial compression state.

As a further improvement of the utility model, the cross section of the force transmission ring is rectangular or square.

The flexible pipe joint is applied to the connection of cast iron pipes, namely two or more cast iron pipes are connected together through the combination of the socket and the plug.

The utility model also discloses a pipeline disappears, it has a plurality of pipeline section, and adjacent pipeline section concatenates through foretell flexible pipeline interface.

The utility model has the advantages that: the utility model discloses the biography power ring of doing is the face atress when transmission effort, and not the line contact atress, and consequently the transmission of power is comparatively abundant, firm, also is difficult for taking place the incident that the biography power ring deviates from, through the pipeline of losing power of this kind of flexible pipeline interface formation, when forming a plurality of axial skew and axial displacement, can effectively eliminate or reduce the stress that the pipeline bore.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

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

Detailed Description

The flexible pipe joint shown in fig. 1 comprises a socket 2 and a plug 1 inserted in the socket 2. The front end of the plug 1 is provided with a sealing ring 3, the excircle 9 at the front end of the plug 1 is in clearance fit with the inner hole 8 at the rear end of the bearing head 2, and the sealing ring 3 is positioned in front of the lug boss 6 of the plug 1 and rebounds under radial pressure to realize the sealing between the bearing head 2 and the joint 1 and achieve the aim of water prevention.

A flexible force transmission structure is arranged between the plug 1 and the socket 2 and is used for transmitting acting force between the plug and the socket. The flexible force transmission structure comprises a force transmission cavity 10 and a force transmission ring 4.

Wherein, the power transmission cavity 10 is enclosed by the inner wall of the end part of the socket 2 and the outer wall of the plug 1. The force transmission ring 4 is a ring shape with an opening, has elasticity, shows radial expansion elasticity, and can close the opening by external force to reduce the outer diameter. During the connection of the socket 2 to the plug 1, the force transmission ring 4 is confined in the force transmission chamber 10 to transmit the force, so that a pivot angle and an axial displacement can be generated between the plug 1 and the socket 2, but the plug cannot be pulled off.

Different from the prior art and the technical scheme of CN 107061902, in the embodiment, when the socket 2 and the plug 1 transmit acting force, the force applied to the force transmission ring 4 is surface force, and the force applied to the corresponding socket 2 and the corresponding plug 1 is also surface force. The surface stress means that the stress is surface contact and can be a plane or a cambered surface. Through the surface stress mode, the force transmission ring 4 is not easy to rotate or incline, namely, accidents such as the force transmission ring 4 falling off and the like can not happen; in addition, the way of surface stress also makes the transmission of force more reliable.

In the force transmission chamber 10, the force transmission ring 4 has a certain spatial margin either in the axial direction or in the radial direction. The axial space allowance is embodied in that the force transmission ring 4 can limit the relative axial movement amount of the socket head in the force transmission cavity 10, the movement is along with one of the plug 1 or the socket head 2, and therefore two pipes in which the plug 1 and the socket head 2 are positioned can be displaced axially; the radial space allowance of the force transmission ring 4 is embodied in that a certain gap exists between the inner diameter of the force transmission ring 4 and the outer diameter of the cylindrical surface 7, and the gap between the outer circle 9 at the front end of the plug 1 and the inner hole 8 at the rear end of the socket 2 form the limitation on the swing angle of the interface, so that the two pipes where the plug 1 and the socket 2 are positioned can swing on the axis, and the sealing performance of the interface cannot be influenced by excessive swing angle.

Further preferably, the acting force between the plug 1, the socket 2 and the force transmission ring 4 includes at least one of axial shearing force and radial pressure. The axial shearing force provides the force for resisting the axial drawing of the two pipes, and the radial pressure provides the force for supporting the two pipes in the radial direction.

The following configuration is adopted in the embodiment to form the power transmission chamber 10.

The outer diameter of the front part of a lug boss 6 on the plug 1 is smaller than the inner diameter of a sealing hole of the socket 2, the maximum outer diameter of the lug boss 6 is smaller than the inner diameter of a pipe buckle 5 of the socket 2, and the rear part of the lug boss 6 is provided with an annular step. The back wall of the boss 6 is a vertical plane 11 and is used as a side surface of the step, the vertical plane 11 faces the insertion opening direction of the socket 2, the step is also composed of a cylindrical surface 7, and the cylindrical surface 7 is vertically connected with the vertical plane 11 and is positioned at the back end of the vertical plane 11; the vertical plane 11 forms a right angle with the cylindrical surface 7, seen in cross-section. The rearmost part of the boss 6 is also provided with an inclined surface 12 connected to the rear end of the cylindrical surface 7, and the inclined surface 12 is inclined with a larger front end diameter and a smaller rear end diameter. The front end of the socket 2 is provided with a pipe buckle 5 extending towards the central axis direction, and the inner ring of the pipe buckle 5 encloses an insertion opening of the socket 2. The force transmission chamber 10 is thus enclosed by the vertical plane 11, the cylindrical surface 7, the inclined surface 12, the pipe button 5 and the inner wall of the front part of the socket 2.

The outer diameter of the force transmission ring 4 is larger than the inner diameter of the pipe buckle 5, the inner diameter of the force transmission ring 4 is smaller than the maximum outer diameter of the boss 6, so that the force transmission ring 4 is limited between the pipe buckle 5 and a vertical surface from the axial direction, and the force transmission ring 4 is limited between the inner wall of the socket 2 and the cylindrical surface 7 from the radial direction.

Specifically, the outer peripheral surface of the force transmission ring 4 abuts against the inner wall of the end of the socket 2, and when the socket 2 and the plug 1 are in a connected state, the inner ring of the force transmission ring 4 is in a state of being compressed in the straight radial direction. Furthermore, the inner diameter of the inner ring surface of the force transmission ring 4 is slightly larger than the outer diameter of the cylindrical surface 7, and the force transmission ring 4 and the bearing head are coaxially controlled in the inner direction. In an initial state, the outer circle of the force transmission ring 4 is tightly attached to the inner hole at the front end of the socket 2 because of the elasticity of the force transmission ring, and a certain gap is reserved between the inner ring surface of the force transmission ring and the cylindrical surface 7; when the socket 2 and the plug 1 are subjected to radial force and swing to a certain extent, the inner ring surface of the force transmission ring 4 covers or approximately covers the cylindrical surface 7 to form surface contact, and simultaneously, the force transmission ring and the plug are used as supports of the two.

Preferably, the width of the cylindrical surface 7 is greater than the width of the inner annular surface of the force transmission ring 4, so that the force transmission ring 4 is entirely within the range of the step when the force transmission ring is subjected to axial tensile force. With this configuration, the force transmission ring 4 is less susceptible to tilting, rotation, and other misalignment displacements.

In the preferred embodiment, the force transfer ring 4 is provided with a first shear plane 13 at the front end and a second shear plane 14 at the rear end. When the plug 1 and the socket 2 are in a drawing state, the force transmission ring 4 is subjected to axial shearing force, and at the moment, the first shearing plane 13 and the vertical plane 11 form surface contact to transmit shearing load; the second shear plane 14 and the inner wall of the pipe buckle 5 form surface contact to transfer shear load, and the shear load is transferred to the socket 2, the plug 1 and the corresponding pipe section respectively, so that the pipeline becomes a force transfer type flexible interface pipeline which cannot be separated. Either the first shear plane 13 or the second shear plane 14 may be part of the corresponding end of the force transfer ring 4 or may simultaneously be an end face of the force transfer ring 4.

In the preferred embodiment, the cross section of the force transmission ring 4 is rectangular or square, which is convenient for construction and manufacturing.

The flexible interface tube is different from most flexible interface tubes made of steel materials, the tubular material can be cast iron, and the boss can be a lantern ring which is sleeved and fixed on the tube body to form a plug.

The flexible pipeline interface is installed as follows:

firstly, placing a sealing ring 3 at the front end of a boss 6 of a plug 1, coating a lubricant on a sealing cavity of a bearing head 2, keeping the axis of a pipe to be installed consistent with the axis of the installed pipe, pulling the plug 1 into the bearing head 2 by external force, closing an opening of a force transmission ring 4 by the external force to reduce the outer diameter, pushing the inner hole of a pipe buckle 5 into a force transmission cavity 10 and pushing the inner hole onto a step part of the boss 6; at this moment, because the external diameter of the force transmission ring 4 is greater than the internal diameter of the pipe buckle 5, the internal diameter of the force transmission ring 4 is less than the maximum external diameter of the lug boss 6, the bearing and the plug have certain axial displacement and swing displacement of the axis angle (radial) in the interface, and the axial force is transmitted and the pull-off of the connecting position is prevented by the anti-shearing strength of the force transmission ring 4, and meanwhile, the radial swing and the shearing load are borne by the radial compressive strength of the force transmission ring 4, so that the axial stress and the bending stress borne by the pipeline are reduced, and a force transmission type flexible interface pipeline which can not be pulled off is formed; at this time, the seal ring 3 is rebounded by its pressure to seal the interface.

By utilizing the pipeline interface structure, a plurality of pipeline sections can be flexibly connected, specifically, a plug of a later pipeline section is inserted in a socket of a previous pipeline section, and adjacent pipeline sections of a plurality of the pipeline sections are connected in series to form a whole force-eliminating pipeline.

In the pipeline interface in the embodiment, when the pipeline expands with heat and contracts with cold under the working temperature difference, the expansion and contraction amount of the pipeline is compensated through the relative axial displacement of the bearing and the plug 1 or the axial displacement amount of the overlapped multiple interfaces, and the temperature difference stress of the pipeline is eliminated or reduced; when the pipeline is bent when bearing shear load, the pipeline adapts to the change of a pipeline through the relative swing angle of a bearing and a plug or the axis offset of a plurality of superposed interface swing angles, and the bending stress of the pipeline is eliminated or reduced; when the pipeline is drawn under the action of internal pressure or external force, the bearing and the plug counteract the drawing force through displacement, or a force-bearing pipe section which counteracts the drawing force with the friction resistance of a longer pipe section is automatically formed through the force transmission of the force transmission ring; uneven settlement appears in the basis of pipeline, the ground sinks, the landslide, fault or liquefied soil layer etc. cause the pipeline unsettled or big deformation appears, when making the pipeline bear tensile force and bending force, the pipeline passes through the biography power of power ring, the axial displacement volume of a plurality of interfaces of stack and the offset of axis pivot angle, the bigger deformation of adaptation topography, axial stress and the bending stress that the reduction pipeline bore, effectively avoid traditional pipeline under above operating mode, the interface draws and takes off the seepage and the accident that the pipe wall is pressed burst appear, thereby become the comprehensive stress that bears through the reduction pipeline, improve pipeline fail safe nature's advanced pipeline. In any of the above cases, the force transmission ring receiving the force from the surface serves as a force transmission member.

The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

Claims

1. The utility model provides a flexible pipeline interface, includes the socket and pegs graft the plug in the socket, is equipped with flexible power transmission structure between plug and the socket, its characterized in that, flexible power transmission structure includes:

the force transmission cavity is formed by the inner wall of the front part of the bearing head and the outer wall of the plug in a surrounding way;

the elastic force transmission ring is limited in the force transmission cavity to transmit acting force, so that a certain amount of axial displacement and a certain swing angle can be generated between the plug and the socket but cannot be pulled out;

2. The flexible pipe interface according to claim 1, wherein: the force comprises an axial shear force and/or a radial pressure force.

3. The flexible pipe interface according to claim 2, wherein: the plug outer wall is equipped with the step portion, the step portion includes the vertical plane towards holding the first front end inserted hole to and the vertical plane's of perpendicular connection face of cylinder, the internal diameter of power transmission ring inner ring face slightly is greater than the external diameter of cylinder, and inner ring face and the coaxial axle center of holding the first hole.

4. A flexible pipe interface as recited in claim 3, wherein: the width of the cylindrical surface is larger than that of the inner ring surface.

5. A flexible pipe interface as recited in claim 3, wherein: the front end of the force transmission ring is provided with a first shear plane, and the first shear plane can form surface contact with a vertical plane to transmit shear force.

6. The flexible conduit interface of claim 5, wherein: the front end of the bearing head is provided with a pipe buckle extending towards the axis direction, the rear end of the force transmission ring is provided with a second shear plane, and the second shear plane can form surface contact with the inner wall of the pipe buckle to transmit shear force.

7. A flexible pipe interface as recited in claim 3, wherein: the outer peripheral surface of the force transmission ring is abutted to the inner wall of the bearing head, and the force transmission ring is in a radial compression state.

8. The flexible pipe interface according to any one of claims 3 to 7, wherein: the cross section of the force transmission ring is rectangular or square.

9. A pipeline disappears, includes a plurality of pipeline section, its characterized in that: adjacent pipe sections are connected in series by a flexible pipe joint according to any of claims 1 to 8.