Flexible anti-seismic pipeline and assembling method thereof

Abstract

The invention discloses a flexible anti-seismic pipeline and an assembling method thereof. The pipeline comprises a switching pipeline; the spherical joints are installed at the two ends of the switching pipeline respectively, each spherical joint comprises a hemispherical shell, an annular inner joint, an outer connecting pipe and an inner connecting pipe, and one part of the annular inner joint is inserted into the hemispherical shell and can rotate in the hemispherical shell; a first annular limiting groove is formed in the inner wall of the hemispherical shell in the circumferential direction of the hemispherical shell, a second annular limiting groove located in the hemispherical shell is formed in the outer wall of the annular inner connector in the circumferential direction of the annular inner connector, and a water absorption expansion strip is arranged between the first annular limiting groove and the second annular limiting groove. The pipeline system freely rotates, stretches and retracts in an expected space, can deform and absorb energy during strong vibration, further can bear building structure changes caused by earthquakes, reduces stress borne by the pipeline, and accordingly improves the leakage-proof capacity of the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline earthquake resistance, and in particular to a flexible earthquake-resistant pipeline and an assembly method thereof. Background Art

[0002] At present, water pipe systems are widely used in people's daily lives. The water pipe systems in buildings are generally rigidly connected at the connection nodes, and the water pipe systems are prone to rupture under earthquake conditions.

[0003] The existing Chinese invention patent application with application number CN202111087650.0 discloses a universal flexible pipe joint suitable for seismic isolation structures, including the upper part of a building, the lower part of a building, a seismic isolation layer pipe and a flexible connecting pipe, wherein the seismic isolation layer pipe is an "L"-shaped tubular structure composed of a transverse section and a longitudinal section, and the two transverse sections of the seismic isolation layer pipe are respectively connected to the upper part of the building and the lower part of the building through a fixed stand, and the two longitudinal sections are connected to the two ends of the flexible connecting pipe through a universal flexible pipe joint. The present invention solves the uncertainty caused by the uncertainty of the direction of earthquake displacement. By using a universal flexible pipe joint, the deformation direction can be synchronized with the earthquake displacement direction, eliminating the shear force between the joint and the hose, and ensuring the normal operation of the hose.

[0004] The Chinese invention patent application with application number CN201010511089.X discloses a double-seal spherical compensation joint, which includes a body and a spherical shell, a section of the inner cavity of the spherical shell is spherical, and a corresponding spherical surface on the body cooperates with the spherical shell, the spherical surface of the body is arranged in the inner cavity of the spherical shell, and one end of the spherical shell extends outward with a joint, the joint and the inner wall of the spherical shell form a step, the end face of the joint is connected to the gland through connecting bolts and connecting nuts, the inner cavity shape of the gland cooperates with the inner cavity of the spherical shell to form a spherical inner cavity, and a U-shaped sealing ring is arranged between the end face of the gland and the step of the spherical shell, in addition, a spherical rubber tube is also arranged in the spherical inner cavity formed by the body and the spherical shell, and flanges are arranged at the outward ends of the spherical shell and the body, which not only has a simple structure and good deflection, but also has good sealing effect and high safety and reliability.

[0005] Both of the above schemes disclose the use of movable joints in combination with hoses to provide a certain amount of movable margin for the water pipe system, thereby adapting to deformations occurring under earthquake conditions and preventing the water pipe system from breaking. However, since the outer shells of the spherical joints in the above schemes are separately arranged and connected with bolts, the thickness and cross-sectional dimensions of the spherical outer shells are relatively large, which is not suitable for working conditions in narrow spaces and has a small number of applicable scenarios. Secondly, for flexible connecting pipes, their ability to expand and contract and their ability to retain their overall shape are poor, and they are prone to breaking or bending under earthquake conditions, affecting the water flow capacity of the pipes. Summary of the invention

[0006] The present invention provides a flexible earthquake-resistant pipeline and an assembly method thereof to solve the above problems.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a flexible earthquake-resistant pipeline, comprising Transfer pipe, can be extended freely; The spherical joints are respectively installed at both ends of the transfer pipe, and include a hemispherical outer shell, an annular inner joint, an outer connecting pipe and an inner connecting pipe. The outer surface of the annular inner joint is adapted to the inner arc surface of the hemispherical outer shell. A part of the annular inner joint is inserted into the hemispherical outer shell and can rotate in the hemispherical outer shell. The outer connecting pipe is connected to the hemispherical outer shell and is used to connect to a common pipe. The inner connecting pipe is connected to the annular inner joint and is used to connect to the transfer pipe. An annular limiting groove 1 is provided on the inner wall of the hemispherical shell along its circumference, and an annular limiting groove 2 is provided on the outer wall of the annular inner joint along its circumference and is located inside the hemispherical shell. The cross-sectional length of the annular limiting groove 1 is greater than the cross-sectional length of the annular limiting groove 2. A water absorption expansion strip is provided between the annular limiting groove 1 and the annular limiting groove 2, a part of the water absorption expansion strip is located in the annular limiting groove 1, and the other part is located in the annular limiting groove 2, so as to realize the sealing and connection between the hemispherical shell and the annular inner joint; the water absorption expansion strip can move in the annular limiting groove 1 when the annular inner joint rotates.

[0008] The present invention provides a flexible earthquake-resistant pipe. Further, the hemispherical shell is made of a material with certain elastic deformation, and a necking is formed at the connecting end of the hemispherical shell and the annular inner joint, and the necking radius is 0-20% smaller than the center radius of the hemispherical shell.

[0009] The present invention provides a flexible earthquake-resistant pipeline. Further, the water-absorbing expansion strip completely fills the annular limiting groove 2, completely fills the annular limiting groove 1 in the radial direction, and does not completely fill the annular limiting groove 1 in the cross-sectional direction.

[0010] The present invention provides a flexible earthquake-resistant pipeline. Furthermore, the water-absorbing expansion strip can be replaced by a sealing deformable material with a certain shear resistance.

[0011] The present invention provides a flexible seismic-resistant pipeline. Further, the transfer pipeline includes a relay telescopic pipe and connecting pipelines installed at both ends of the relay telescopic pipe. One end of the connecting pipeline is connected to the inner connecting pipe, and the other end is sealed and connected to the relay telescopic pipe and can move along the axial direction of the relay telescopic pipe to realize the extension and retraction of the transfer pipeline.

[0012] The present invention provides a flexible earthquake-resistant pipeline. Further, one end of the connecting pipeline is slidably inserted into the relay telescopic tube, and the insertion end of the connecting pipeline is provided with a limiting groove along its circumference, and a sealing strip is provided in the limiting groove, and the sealing strip abuts against the inner wall of the relay telescopic tube to realize sliding sealing between the connecting pipeline and the relay telescopic tube; The end of the relay telescopic pipe is provided with a fastening device which cooperates with the sealing strip to limit the telescopic length of the connecting pipeline.

[0013] The present invention provides a flexible earthquake-resistant pipeline. Further, the fastening device includes a nut structure, the end of the relay telescopic tube is provided with a thread, the nut structure is threadedly connected to the relay telescopic tube and its inner side is provided with a limiting portion protruding from the inner surface of the relay telescopic tube, the sealing strip abuts against the limiting portion to prevent the connecting pipeline from falling out of the relay telescopic tube.

[0014] The present invention provides a flexible earthquake-resistant pipeline. Further, the fastening device comprises a protrusion installed on the inner wall of the relay telescopic tube.

[0015] The present invention provides a flexible earthquake-resistant pipeline. Further, the annular limiting groove 1 and the annular limiting groove 2 are arranged in multiple groups side by side.

[0016] The present invention provides an assembly method, comprising the following steps: installing a water-absorbing expansion strip in the annular limiting groove No. 2 of the annular inner joint, inserting the annular inner joint into the hemispherical outer shell by utilizing the elastic deformation performance of the hemispherical outer shell and the annular inner joint, and inserting the water-absorbing expansion strip into the annular limiting groove No. 1, thereby completing the assembly of the spherical joint; Bond and fix the inner connecting pipe to the connecting pipeline, adjust the length of the transfer pipeline, connect the outer connecting pipe to the ordinary pipeline, and complete the installation of the flexible earthquake-resistant pipeline.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The seismic-resistant pipeline can rotate and expand freely within the expected range, reducing the destructive force of the pipeline under earthquake disasters. Through limited rotation and expansion, it can resist the direct destructive force of strong seismic waves on the pipeline and the destructive force of landform changes, and prevent the pipeline interface from being pulled out and bent; 2. The present application adopts a material with certain elastic deformation to make a hemispherical shell and an annular inner joint. The elastic deformation performance of the hemispherical shell is used to directly insert the annular inner joint into the hemispherical shell, and the hemispherical shell and the annular inner joint are self-locked and sealed with a water-absorbing expansion strip, so as to realize an integrated molded shell, reduce the shell thickness, and be applicable to more places; and there is no need to use metal fastening, and there is no risk of rust; 3. The transfer pipe adopts the form of an axial expansion pipe, which can expand and contract axially with the rotation of the ball joint. It has a strong ability to maintain the overall shape, avoids breakage and bending under earthquake conditions, and ensures the water flow capacity of the pipeline; 4. The standardized ball head and telescopic tubes of different lengths in this application are suitable for shockproof scenes of various lengths; they are assembled by plug-in bonding, without the need for flange interfaces or additional instruments, and are easy to operate.

[0018] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of the earthquake-resistant pipeline of the present invention; Figure 3 It is a schematic diagram of explosion of the earthquake-resistant pipeline of the present invention; Figure 4 This is a schematic diagram of the rotation state of the earthquake-resistant pipeline of the present invention; Figure 5 This is a schematic diagram of the transfer pipe of the present invention using a nut structure for connection; Figure 6 This is a schematic diagram of another nut structure connection used in the transfer pipe of the present invention.

[0020] Reference numerals: 1. Transfer pipeline; 1.1. Relay expansion pipe; 1.2. Connecting pipeline; 1.3. Limit groove; 1.4. Sealing strip; 1.5. Nut structure; 1.6. Rubber sleeve; 1.7. Fastening bolt; 2. Spherical joint; 3. Hemispherical shell; 4. Annular inner joint; 5. External connecting pipe; 6. Internal connecting pipe; 7. Shrinkage; 8. Annular limit groove 1; 9. Annular limit groove 2; 10. Water absorption expansion strip. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 6 As shown, the present invention discloses a flexible earthquake-resistant pipeline and an assembly method thereof. The flexible earthquake-resistant pipeline can be stacked in multiple sections for use in a building, thereby reducing the tensile, compressive and bending stresses caused by earthquakes of different levels on the pipeline. The earthquake-resistant pipeline includes a switching pipeline 1 and spherical joints 2 respectively installed at both ends of the switching pipeline 1. The switching pipeline 1 can freely extend along its axial direction, and the spherical joint 2 can rotate freely. The pipeline system of the present application can rotate and retract freely within the expected space, can deform and absorb energy during strong vibrations, and can further withstand changes in the building structure caused by earthquakes, reduce the stress borne by the pipeline, and thus improve the pipeline's leakage prevention ability.

[0022] The spherical joint 2 includes a hemispherical shell 3, an annular inner joint 4, an outer connecting pipe 5 and an inner connecting pipe 6. The hemispherical shell 3 and the annular inner joint 4 are both made of materials with certain elastic deformation, such as PVC material, rubber and the like. The outer surface of the annular inner joint 4 is adapted to the inner arc surface of the hemispherical shell 3. A part of the annular inner joint 4 is inserted into the hemispherical shell 3 and can rotate in the hemispherical shell 3; the outer connecting pipe 5 is connected to the hemispherical shell 3 and is used to be connected to a common pipeline; the inner connecting pipe 6 is connected to the annular inner joint 4 and is used to be connected to the connecting pipeline 1.2; a constriction 7 is formed at the connecting end of the hemispherical shell 3 and the annular inner joint 4, and the radius of the constriction 7 is 0-20% smaller than the center radius of the hemispherical shell 3. Preferably, the insertion end radius of the annular inner joint 4 is slightly smaller than the radius of the constriction 7. Through the elastic deformation ability of the hemispherical shell 3 and the annular inner joint 4, the annular inner joint 4 is inserted into the hemispherical shell 3, and the water absorption expansion strip 10 is cooperated to achieve self-locking.

[0023] An annular limiting groove 8 with an arc-shaped cross-section is provided on the inner wall of the hemispherical shell 3 along its circumferential direction, and an annular limiting groove 29 is provided on the outer wall of the annular inner joint 4 along its circumferential direction. The annular limiting groove 29 is located in the hemispherical shell 3, and the cross-sectional length of the annular limiting groove 18 is greater than the cross-sectional length of the annular limiting groove 29. A water absorption expansion strip 10 is provided between the annular limiting groove 18 and the annular limiting groove 29, a part of the water absorption expansion strip 10 is located in the annular limiting groove 18, and the other part is located in the annular limiting groove 29, which is used to achieve sealing and connection between the hemispherical shell 3 and the annular inner joint 4, and the water absorption expansion strip 10 can move in the annular limiting groove 8 when the annular inner joint 4 rotates.

[0024] After absorbing water, the water-absorbing expansion strip 10 completely fills the annular limiting groove 29, completely fills the annular limiting groove 18 in the radial direction, and does not completely fill the annular limiting groove 18 in the cross-sectional direction, and is used to move in the annular limiting groove 18 when the annular inner joint 4 rotates. When the swing angle of the annular inner joint 4 reaches the preset limit deflection angle, the water-absorbing expansion strip 10 protruding in the annular limiting groove 29 just reaches the limit position of the annular limiting groove 18, and relies on the shear strength of the water-absorbing expansion strip 10 to prevent the annular inner joint 4 from being pulled out after being stressed; the water-absorbing expansion strip 10 is used to achieve the functions of sealing and connection. The cross-sections of the annular limiting groove 18 and the annular limiting groove 29 can be square, rectangular and circular, and the grooves can be arranged in multiple groups at intervals and side by side. The water-absorbing expansion strip 10 can also be a deformable material with a certain shear strength, and the deformable material can be wrapped with a rubber sealing material to achieve the functions of deformation and sealing, wherein the deformable material can be an elastic rubber, a magnetic deformable material or a spring body wrapped with a polymer plastic.

[0025] The transfer pipe 1 includes a relay telescopic tube 1.1 and a connecting pipe 1.2 installed at one end of the relay telescopic tube 1.1, one end of the connecting pipe 1.2 is connected to the inner connecting pipe 6, wherein the connection method can be bonding or other forms of sealed connection; the other end is sealedly connected to the relay telescopic tube 1.1 and can move along the axial direction of the relay telescopic tube 1.1 to achieve the expansion and contraction of the transfer pipe 1; a shrink tube is set at one end of the relay telescopic tube 1.1 away from the connecting pipe 1.2 and is connected to the inner connecting pipe 6 at the other end.

[0026] One end of the connecting pipeline 1.2 is slidably inserted into the relay telescopic tube 1.1, and the insertion end of the connecting pipeline 1.2 is provided with a limiting groove 1.3 along its circumference, and a sealing strip 1.4 is provided in the limiting groove 1.3. The sealing strip 1.4 is pressed against the inner wall of the relay telescopic tube 1.1 to realize a sliding seal between the connecting pipeline 1.2 and the relay telescopic tube 1.1; a fastening device for limiting the telescopic length of the connecting pipeline 1.2 is installed at the end of the relay telescopic tube 1.1.

[0027] The fastening device includes a nut structure 1.5, the end of the relay telescopic tube 1.1 is provided with a thread, the nut structure 1.5 is threadedly connected to the relay telescopic tube 1.1 and its inner side is provided with a limiting portion protruding from the inner surface of the relay telescopic tube 1.1, and the sealing strip 1.4 abuts against the limiting portion to prevent the connecting pipeline 1.2 from falling out of the relay telescopic tube 1.1.

[0028] Furthermore, the fastening device can also be a rubber sleeve 1.6 and a fastening bolt 1.7, which are installed on the inner wall of the relay telescopic tube 1.1; by forming a protrusion on the inner wall of the relay telescopic tube 1.1, the protrusion cooperates with the sealing strip 1.4 to limit the connection pipeline 1.2 from slipping out. Other similar fastening port design ideas designed by force limit should be regarded as the same as this fastening device.

[0029] In addition, the fastening device can also use mortise and tenon structures, rotating clips or other designs in the form of protrusions that utilize the shear strength of the material to prevent the design from being pulled out after being stressed, which should be considered to be the same as this limit device.

[0030] In addition, multiple groups of limiting grooves 1.3 can be provided on the limiting protrusions, and the cross-section of the limiting grooves 1.3 can be square, rectangular or circular; the sealing strip 1.4 can be made of plastic, rubber, composite elastomer or magnetic deformable material.

[0031] When the two sides of the connecting pipeline 1.2 are displaced by external force, the connecting pipeline 1.2 will move freely within the preset range of the relay telescopic tube 1.1, so that the structure can obtain free telescopic ability. When the displacement reaches the preset limit, the internal sealing strip 1.4 will contact the limit device, which uses the shear strength to prevent the connecting pipeline 1.2 from being pulled out after being stressed.

[0032] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A flexible seismic-resistant pipeline, characterized in that: include The transfer pipe (1) can be freely extended; The spherical joint (2) is respectively installed at both ends of the transfer pipe (1), and comprises a hemispherical outer shell (3), an annular inner joint (4), an outer connecting pipe (5) and an inner connecting pipe (6); the outer surface of the annular inner joint (4) is adapted to the inner arc surface of the hemispherical outer shell (3); a part of the annular inner joint (4) is inserted into the hemispherical outer shell (3) and can rotate in the hemispherical outer shell (3); the outer connecting pipe (5) is connected to the hemispherical outer shell (3) and is used to be connected to a common pipe; the inner connecting pipe (6) is connected to the annular inner joint (4) and is used to be connected to the transfer pipe (1); An annular limiting groove 1 (8) is provided on the inner wall of the hemispherical shell (3) along its circumference, and an annular limiting groove 2 (9) is provided on the outer wall of the annular inner joint (4) along its circumference and located inside the hemispherical shell (3). The cross-sectional length of the annular limiting groove 1 (8) is greater than the cross-sectional length of the annular limiting groove 2 (9). A water-absorbing expansion strip (10) is provided between the annular limiting groove 1 (8) and the annular limiting groove 2 (9). A part of the water-absorbing expansion strip (10) is located inside the annular limiting groove 1 (8), and the other part is located inside the annular limiting groove 2 (9), so as to achieve sealing and connection between the hemispherical shell (3) and the annular inner joint (4); the water-absorbing expansion strip (10) can move inside the annular limiting groove 1 (8) when the annular inner joint (4) rotates.

2. A flexible seismic-resistant pipeline according to claim 1, characterized in that: The hemispherical shell (3) is made of a material with a certain elastic deformation, and a constriction (7) is formed at the connecting end of the hemispherical shell (3) and the annular inner joint (4), and the radius of the constriction (7) is 0-20% smaller than the central radius of the hemispherical shell (3).

3. The flexible seismic-resistant pipeline according to claim 1, characterized in that: The water-absorbing expansion strip (10) completely fills the annular limiting groove 2 (9), completely fills the annular limiting groove 1 (8) in the radial direction, and does not completely fill the annular limiting groove 1 (8) in the cross-sectional direction.

4. The flexible seismic-resistant pipeline according to claim 1, characterized in that: The water-swellable strip (10) can be replaced by a sealing deformable material having a certain shear resistance.

5. The flexible seismic-resistant pipeline according to claim 1, characterized in that: The transfer pipe (1) comprises a relay telescopic pipe (1.1) and connecting pipes (1.2) installed at both ends of the relay telescopic pipe (1.1); one end of the connecting pipe (1.2) is connected to the inner connecting pipe (6), and the other end is sealedly connected to the relay telescopic pipe (1.1) and can move along the axial direction of the relay telescopic pipe (1.1) to achieve telescopic movement of the transfer pipe (1).

6. The flexible seismic-resistant pipeline according to claim 5, characterized in that: One end of the connecting pipeline (1.2) is slidably inserted into the relay telescopic tube (1.1), and a limiting groove (1.3) is provided along the circumference of the insertion end of the connecting pipeline (1.2), and a sealing strip (1.4) is provided in the limiting groove (1.3), and the sealing strip (1.4) abuts against the inner wall of the relay telescopic tube (1.1) to achieve sliding sealing between the connecting pipeline (1.2) and the relay telescopic tube (1.1); The end of the relay telescopic tube (1.1) is provided with a fastening device which cooperates with the sealing strip (1.4) to limit the telescopic length of the connecting pipeline (1.2).

7. The flexible seismic-resistant pipeline according to claim 6, characterized in that: The fastening device comprises a nut structure (1.5), the end of the relay telescopic tube (1.1) is provided with a thread, the nut structure (1.5) is threadedly connected to the relay telescopic tube (1.1) and its inner side surface is provided with a limiting portion protruding from the inner surface of the relay telescopic tube (1.1), and the sealing strip (1.4) abuts against the limiting portion to prevent the connecting pipeline (1.2) from falling out of the relay telescopic tube (1.1).

8. The flexible seismic-resistant pipeline according to claim 6, characterized in that: The fastening device comprises a protrusion mounted on the inner wall of the relay telescopic tube (1.1).

9. The flexible seismic-resistant pipeline according to claim 1, characterized in that: The annular limiting grooves 1 (8) and annular limiting grooves 2 (9) are arranged in multiple groups side by side.

10. An assembly method, comprising the flexible earthquake-resistant pipe according to any one of claims 1 to 9, characterized in that: The following steps are involved: A water-absorbing expansion strip is installed in the annular limiting groove No. 2 of the annular inner joint, and the annular inner joint is inserted into the hemispherical outer shell by utilizing the elastic deformation performance of the hemispherical outer shell and the annular inner joint, and the water-absorbing expansion strip is inserted into the annular limiting groove No. 1, thereby completing the assembly of the spherical joint; Bond and fix the inner connecting pipe to the connecting pipeline, adjust the length of the transfer pipeline, connect the outer connecting pipe to the ordinary pipeline, and complete the installation of the flexible earthquake-resistant pipeline.

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