Pipe vibration isolation device

Abstract

NOT VISIBLE DUE TO STATUS OF PATENT

Description

Pipeline vibration isolation device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202311684771.2, filed on December 8, 2023, entitled “Pipeline Vibration Isolation Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the technical field of pipeline vibration isolation, and in particular to a pipeline vibration isolation device. Background Art

[0004] When nuclear power plant pipelines pass through walls and connect to them, penetrations are generally used. First, the penetrations must bear the forces and bending moments of the pipeline supports and meet the pipeline support stiffness requirements. Secondly, the penetrations should be designed based on their use environment to meet the thermal insulation and fire resistance requirements of the pipelines under normal operation or accident conditions.

[0005] Currently, pipe penetrations are typically made of steel and anchored in concrete walls. However, vibrations from large pipelines in nuclear power plants are often transmitted through the walls where the pipes are supported and penetrated to areas such as the main control room, generating noise and impacting normal operation.

[0006] Currently, vibration isolation for pipelines is generally performed using vibration isolation components such as rubber pads and spring isolators to reduce vibration transmission. However, in actual nuclear power applications, for large pipeline vibration, traditional isolation devices such as rubber isolation pads, spring isolators, and air springs have the following technical problems:

[0007] 1. Weak rigidity and low bearing capacity, unable to meet the rigidity and bearing capacity requirements of large pipeline support points;

[0008] Second, rubber vibration isolation pads are not resistant to high temperatures, age quickly, and their durability cannot meet the design requirements of nuclear power plants;

[0009] 3. The damping ratio of the spring isolator is small, and the vibration isolation effect is poor in the high-frequency area;

[0010] 4. It is generally only applicable to vibration isolation in one direction and cannot meet the vibration isolation requirements of nuclear power pipelines in multiple directions such as vertical, horizontal and rotation.

[0011] The vibration of large pipelines in nuclear power plants has complex causes and rich frequency components. The vibration isolation methods currently used are not very effective in the high-frequency region.

[0012] Summary of the Invention

[0013] In view of the shortcomings of the existing technology, the present invention provides a pipeline vibration isolation device to overcome the defect of poor vibration isolation of nuclear power pipelines in the existing technology.

[0014] The present invention provides a pipeline vibration isolation device, comprising: a penetration piece; a sleeve, which is sleeved outside the penetration piece and has an isolation cavity between the sleeve and the penetration piece, and the sleeve is penetrated by a wall; a vibration isolation assembly, which is sleeved outside the sleeve and comprises a first vibration isolation plate and a second vibration isolation plate, the first vibration isolation plate and the second vibration isolation plate being used to isolate the vibration transmitted from the sleeve to the wall, the vibration including the vibration generated along the axial direction of the penetration piece and the vibration generated along the radial direction of the penetration piece.

[0015] Preferably, a heat-insulating layer is provided on the outer side of the penetration piece, and an outer end surface of the heat-insulating layer is spaced apart from an inner end surface of the sleeve.

[0016] Preferably, both the first vibration isolation plate and the second vibration isolation plate are located in holes provided in the wall; or, at least one of the first vibration isolation plate and the second vibration isolation plate is located outside the hole provided in the wall.

[0017] Preferably, the first vibration isolation plate comprises a first plate body and a second plate body, and the first plate body and the second plate body are located at opposite ends of the second vibration isolation plate along the axial direction of the penetration piece, and a partition is provided on the outer shell of the second vibration isolation plate.

[0018] Preferably, at least one shear nail is further provided on the inner side of the wall, one end of the shear nail is embedded in the wall, and the other end abuts against the partition.

[0019] Preferably, a flange and a plurality of stiffening plates installed on the outside of the flange are further provided on the sides of the first plate body and the second plate body facing away from each other; the plurality of stiffening plates are arranged at intervals around the outer circumference of the flange.

[0020] Preferably, a filling cavity is formed between the end of the first vibration isolation plate facing away from the sleeve and the wall, and the filling cavity is filled with flexible material.

[0021] Preferably, the second vibration isolation plate comprises a plurality of vibration isolation units, which are evenly spaced around the outer circumference of the sleeve and form installation gaps between adjacent vibration isolation units; the installation gaps are filled with anti-rotation components.

[0022] Preferably, the anti-rotation component includes an anti-rotation block and a sealing strip; one end of the anti-rotation block is connected to the sleeve, and the sealing strip is sealed to the other end of the anti-rotation block.

[0023] Preferably, the penetration piece is integrally provided with the sleeve.

[0024] The pipeline vibration isolation device of the present invention has a sleeve provided outside the penetration piece, and an isolation cavity is provided between the sleeve and the penetration piece, thereby playing a role of thermal insulation. A first vibration isolation plate and a second vibration isolation plate are provided outside the sleeve, which can not only meet the stiffness and bearing capacity requirements of large pipelines for multiple degrees of freedom directions of the support point, but also realize the rigid vibration isolation function of complex high-frequency vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application.

[0026] FIG1 is a cross-sectional view of a pipeline vibration isolation device according to one embodiment of the present invention;

[0027] FIG2 is a cross-sectional view of a pipeline vibration isolation device according to another embodiment of the present invention;

[0028] FIG3 is a cross-sectional view taken along the line BB of FIG1 ;

[0029] FIG4 is a cross-sectional view taken along the CC direction of FIG1 ;

[0030] Figure 5 is an enlarged view of part A in Figure 1;

[0031] FIG6 is a cross-sectional view of a pipeline vibration isolation device according to another embodiment of the present invention.

[0032] Reference numerals:

[0033] 100. Pipe vibration isolation device; 200. Pipe vibration isolation device; 300. Pipe vibration isolation device; 1. Penetration piece; 11. Insulation layer; 2. Casing; 21. Isolation cavity; 3. Wall; 31. Shear nail; 4. Vibration isolation assembly; 41. First vibration isolation plate; 411. First plate body; 412. Second plate body; 413. Flange; 414. Stiffening plate; 415. Filling cavity; 42. Second vibration isolation plate; 421. Vibration isolation unit; 422. Installation gap; 423. Anti-rotation member; 424. Anti-rotation block; 425. Sealing strip; 426. Partition. DETAILED DESCRIPTION

[0034] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] FIG1 is a cross-sectional view of a pipeline vibration isolation device 100 according to one embodiment of the present invention.

[0036] As shown in Figure 1, the pipeline vibration isolation device 100 of this embodiment includes a penetration 1, a sleeve 2 that is mounted on the outside of the penetration 1, and a vibration isolation assembly 4. The sleeve 2 is installed through a wall 3, defining an isolation cavity 21 between the sleeve 2 and the penetration 1. The vibration isolation assembly 4 is mounted on the outer periphery of the sleeve 2.

[0037] The pipe vibration isolation device 100 is designed to penetrate the wall 3 and connect to the pipe, providing support and vibration isolation. A hole is formed in the wall 3, and a sleeve 2 is inserted into the hole. The pipe has a section at each opposite end along the axial direction X of the penetration 1. The penetration 1 can be a portion of the pipe located within the wall 3 or a separate pipe connected to the pipe. The penetration 1 can be welded to the pipe.

[0038] The portion of the penetration piece 1 in the hole of the wall 3 is located inside the sleeve 2 and forms an isolation cavity 21 between the penetration piece 1 and the sleeve 2. The isolation cavity 21 can isolate the heat transfer path from the penetration piece 1 to the wall 3 and play a role in heat insulation.

[0039] Along the axial direction X of the penetration piece 1, one end of the sleeve 2 is at least located outside the wall 3, that is, the sleeve 2 extends outside the hole in the wall 3, which is used to increase the heat transfer path from the pipeline to the sleeve 2, thereby preventing excessive heat from the pipeline from being transferred to the wall 3.

[0040] The vibration isolation assembly 4 is arranged between the wall 3 and the sleeve 2. The vibration isolation assembly 4 includes a first vibration isolation plate 41 and a second vibration isolation plate 42. The first vibration isolation plate 41 and the second vibration isolation plate 42 are used to isolate the vibration transmitted from the sleeve 2 to the wall 3. The vibration includes the vibration generated along the axial direction X of the penetration member 1 and the vibration generated along the radial direction Y of the penetration member 1.

[0041] The first vibration isolation plate 41 and the second vibration isolation plate 42 are sleeved around the outer periphery of the sleeve 2 and are respectively arranged along the axial direction X and the radial direction Y of the penetration member 1. The arrangement of the first vibration isolation plate 41 and the second vibration isolation plate 42 along the axial direction X and the radial direction Y of the penetration member 1 means that the first vibration isolation plate 41 and the second vibration isolation plate 42 on the outer periphery of the sleeve 2 can reduce the vibration of the penetration member 1 in the axial direction X and the radial direction Y.

[0042] In the pipeline rigid vibration isolation device 100 of this embodiment, a sleeve 2 is provided outside the penetration member 1, and an isolation cavity 21 is provided between the sleeve 2 and the penetration member 1, thereby playing a role in heat insulation. A first vibration isolation plate 41 and a second vibration isolation plate 42 are provided outside the sleeve 2, which can reduce the axial X and radial Y vibrations of the penetration member 1. It can not only meet the stiffness and bearing capacity requirements of large pipelines for multiple degrees of freedom directions of the support point, but also realize the rigid vibration isolation function of complex high-frequency vibrations.

[0043] As shown in Figure 1, in one embodiment, a thermal insulation layer 11 is provided on the outside of the penetration member 1, with an outer end surface 111 of the thermal insulation layer 11 spaced apart from the inner end surface 211 of the sleeve 2. The outer end surface 111 of the thermal insulation layer 11 refers to the outer circumferential surface of the thermal insulation layer 11, and the inner end surface 211 of the sleeve 2 refers to the inner circumferential surface of the sleeve 2. The space between the outer end surface 111 of the thermal insulation layer 11 and the inner end surface 211 of the sleeve 2 forms an isolation cavity 21.

[0044] Because the insulation layer 11 is sheathed outside the penetration piece 1, two temperature transfer paths are formed from the pipeline to the wall 3. One path is through the penetration piece 1 to the sleeve 2 and then to the wall 3. However, both ends of the sleeve 2 extend at least to the outside of the wall 3 and communicate with the space outside the penetration piece 1. This allows the sleeve 2 to exchange heat with the outside world and reduce the temperature transferred from the pipeline to the wall 3.

[0045] Another heat transfer path is from the penetration piece 1 to the isolation cavity 21 and then transferred to the wall 3 through the sleeve 2. An insulation layer 11 is provided in the isolation cavity 21, and the insulation layer 11 is sleeved on the outside of the penetration piece 1. The temperature from the pipeline to the penetration piece 1 is isolated in the isolation cavity 21 through the insulation layer 11 and will not be transferred to the wall 3.

[0046] As shown in FIG1 , the first vibration isolation plate 41 and the second vibration isolation plate 42 are sleeved on the outer periphery of the sleeve 2 , and are both located in the holes provided in the wall 3 .

[0047] The hole formed in the wall 3 further forms a space for placing the first vibration isolation plate 41 and the second vibration isolation plate 42 . The wall 3 can form a clamping connection between the first vibration isolation plate 41 and the second vibration isolation plate 42 and improve the installation stability thereof.

[0048] FIG2 is a cross-sectional view of a pipeline vibration isolation device 200 according to another embodiment of the present invention.

[0049] 2 , at least one of the first vibration isolation plate 41 and the second vibration isolation plate 42 is located outside the hole in the wall 3. Providing the first vibration isolation plate 41 or the second vibration isolation plate 42 outside the hole in the wall 3 can also achieve a vibration isolation effect.

[0050] In the embodiment shown in FIG. 2 , the second vibration isolation plate 42 is located in the hole opened in the wall 3 , and the first vibration isolation plate 41 is located on both sides outside the wall 3 , which facilitates installation while achieving the effect of vibration isolation.

[0051] In the embodiments shown in FIG. 1 and FIG. 2 , the arrangement of the first vibration isolation plate 41 and the second vibration isolation plate 42 can both reduce the axial and radial vibrations between the penetration piece 1 and the wall 3 .

[0052] In some embodiments, the first vibration isolation plate 41 is arranged along the axial direction of the through-piece 1 and includes a first plate body 411 and a second plate body 412. The second vibration isolation plate 42 is arranged along the radial direction of the through-piece 1, with the first plate body 411 and the second plate body 412 located at opposite ends of the second vibration isolation plate 42. The axial arrangement of the first vibration isolation plate 41 along the through-piece 1 means that the first vibration isolation plate 41 can reduce the vibration generated by the pipeline along the axial direction X of the through-piece 1; the radial arrangement of the second vibration isolation plate 42 along the through-piece 1 means that the second vibration isolation plate 42 can reduce the vibration generated by the pipeline along the radial direction Y of the through-piece 1. The first vibration isolation plate 41 and the second vibration isolation plate 42 can meet the vibration isolation requirements between the through-piece 1 and the wall 3 in both the axial direction X and the radial direction Y of the through-piece 1.

[0053] As shown in Figures 1 and 2, the first vibration isolation plate 41 has a greater thickness in the radial direction Y. Axial vibration of the pipeline is transmitted through the sleeve 2 to the first and second plates 411, 412 on either side, effectively isolating the pipeline's axial vibration. The second vibration isolation plate 42 has a greater width in the axial direction X. Radial vibration of the pipeline is transmitted through the sleeve 2 to the second vibration isolation plate 42, effectively isolating the pipeline's radial vibration.

[0054] As shown in Figures 1 and 2, a partition plate 426 is provided on the outer cover of the second vibration isolation plate 42. At least one shear stud 31 is also provided on the inner side of the wall 3, with one end of the shear stud 31 embedded in the wall 3 and the other end connected to the partition plate 426.

[0055] One end of the shear nail 31 is welded to the partition 426 , so that the shear nail 31 is used to limit the outer end of the second vibration isolation plate 42 on the one hand, and on the other hand, the shear nail 31 and the partition 426 cooperate to prevent the penetration member 1 from rotating.

[0056] FIG3 is a cross-sectional view taken along the line BB in FIG1 .

[0057] As shown in FIG3 , the second vibration isolation plate 42 includes a plurality of vibration isolation units 421 , which are evenly spaced around the outer circumference of the sleeve 2 and form installation gaps 422 between adjacent vibration isolation units 421 . The installation gaps 422 are filled with anti-rotation components 423 .

[0058] The anti-rotation component 423 includes an anti-rotation block 424 and a sealing strip 425 . One end of the anti-rotation block 424 facing the sleeve 2 is connected to the sleeve 2 , and the sealing strip 425 is sealed to the other end of the anti-rotation block 424 .

[0059] The sealing strip 425 is provided to prevent the installation gap 422 from being filled during concrete pouring, thereby preventing unnecessary interference and affecting the vibration isolation function of the vibration isolation device.

[0060] The anti-rotation block 424 is welded to the sleeve 2 , and the anti-rotation piece 423 cooperates with the shear nail 31 to prevent the penetration piece 1 from rotating.

[0061] When the through-piece 1 rotates, the rotational force is first transmitted to the anti-rotation block 424 through the sleeve 2. The anti-rotation block 424 rotates and presses against the second vibration isolation plate 42. The second vibration isolation plate 42 is in a stationary state under the action of the shear pins 31, thereby limiting the rotation of the through-piece 1.

[0062] As for the torsional vibration of the pipeline, since the anti-rotation block 424 is provided on the sleeve, the pipeline torque is mainly transmitted to the second vibration isolation plate 42 through the anti-rotation block 424 , so the pipeline torsion can be isolated by the second vibration isolation plate 42 .

[0063] With the cooperation of the first vibration isolation plate 41, the second vibration isolation plate 42, the shear nails 31 and the anti-rotation member 423, the vibration isolation requirements between the sleeve 2 and the wall 3 along the axial, radial, rotational and other directions of the penetration member 1 are met. Therefore, the vibration isolation device not only realizes the rigidity support function for the pipeline, but also meets the complex high-frequency multi-degree-of-freedom vibration isolation requirements.

[0064] The first vibration isolation plate 41 and the second vibration isolation plate 42 are both made of composite vibration isolation materials. The elastic modulus of the vibration isolation materials is within a specific range and is smaller than the elastic modulus of reinforced concrete. At the same time, they meet the minimum stiffness requirements of the pipeline support and the high temperature, fire resistance, and corrosion resistance requirements of the pipeline anchor point use environment.

[0065] The use of composite vibration isolation materials can overcome the defects of traditional spring vibration isolation such as low stiffness and low bearing capacity. In addition, the composite materials can adjust themselves according to needs and use the anisotropy of the composite material to provide different stiffness in different directions.

[0066] FIG4 is a cross-sectional view taken along the CC direction in FIG1 .

[0067] As shown in FIG4 , a flange 413 and a plurality of stiffening plates 414 are provided on the sides of the first plate 411 and the second plate 412 facing away from each other. The plurality of stiffening plates 414 are spaced apart around the periphery of the flange 413. The plurality of stiffening plates 414 spaced apart around the periphery of the flange 413 means that the plurality of stiffening plates 414 are disposed on the end surface of the flange 413 facing the outside of the hole and are spaced apart around the outer end surface of the flange 413.

[0068] The flange 413 is used to limit the positions of the first plate 411, the second plate 412 and the second vibration isolation plate 42, and the stiffening plate 414 is used to increase the stiffness of the flange 413 itself, thereby increasing the limiting effect of the flange 413 on the first plate 411, the second plate 412 and the second vibration isolation plate 42.

[0069] For the axial vibration of the pipeline, the vibration is transmitted to the first plate body 411 and the second plate body 412 on both sides through the sleeve 2, the flange 413 and the stiffening plate 414, thereby effectively isolating the axial vibration of the pipeline.

[0070] FIG5 is an enlarged view of portion A in FIG1 .

[0071] As shown in Figure 5, a filling cavity 415 is formed between the end of the first vibration isolation plate 41 facing away from the sleeve 2 and the wall 3. Filling cavity 415 is filled with a flexible material. The first vibration isolation plate 41 is not in direct contact with the wall 3 to ensure a clear force transmission path and avoid unnecessary interference that could affect the isolation effect of the vibration isolation assembly 4.

[0072] As shown in FIG. 1 and FIG. 2 , in some embodiments, the penetration piece 1 and the sleeve 2 are integrally provided.

[0073] Integrating the sleeve 2 and the through-piece 1 can reduce the processing steps between the through-piece 1 and the sleeve 2. In some other embodiments, the sleeve 2 and the through-piece 1 can also adopt other detachable installation methods such as threads and clips, which are not limited here.

[0074] FIG6 is a cross-sectional view of a pipeline vibration isolation device 300 according to another embodiment of the present invention.

[0075] As shown in FIG6 , the structure of the flange 413 , the first vibration isolation plate 41 and the second vibration isolation plate 42 can be simplified. The flange 413 is not provided on the outer side of the first vibration isolation plate 41 , and the partition 426 is not provided on the outer peripheral surface of the second vibration isolation plate 42 , thereby simplifying the structure and facilitating installation.

[0076] The rigid pipeline vibration isolation device provided by the present invention utilizes vibration isolation assembly 4, constructed from various composite materials, to effectively isolate vibration transmission within specific high-frequency bands. The isolation assembly 4 also possesses sufficient rigidity and load-bearing capacity to resist external loads. The first and second isolation plates 41, 42, anti-rotation members 423, and shear pins 31 work together to meet vibration isolation requirements along the through-hole 1 in multiple directions, including axial, radial, and rotational directions.

[0077] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pipeline vibration isolation device, characterized in that: include: penetrations; A sleeve, which is sleeved outside the penetration piece and has an isolation cavity between the sleeve and the penetration piece, and the sleeve is penetrated through the wall; A vibration isolation assembly is sleeved on the outside of the sleeve and includes a first vibration isolation plate and a second vibration isolation plate, wherein the first vibration isolation plate and the second vibration isolation plate are used to isolate vibrations transmitted from the sleeve to the wall, wherein the vibrations include vibrations generated along the axial direction of the penetration member and vibrations generated along the radial direction of the penetration member.

2. The pipeline vibration isolation device according to claim 1, characterized in that: A heat-insulating layer is sleeved on the outer side of the penetration piece, and an outer end surface of the heat-insulating layer is spaced apart from an inner end surface of the sleeve.

3. The pipeline vibration isolation device according to claim 1, characterized in that: The first vibration isolation plate and the second vibration isolation plate are both located in the holes provided in the wall; or, At least one of the first vibration isolation plate and the second vibration isolation plate is located outside the hole opened in the wall.

4. The pipeline vibration isolation device according to claim 1, characterized in that: The first vibration isolation plate comprises a first plate body and a second plate body, and the first plate body and the second plate body are located at two opposite ends of the second vibration isolation plate along the axial direction of the penetration member, and a partition plate is disposed on the outer shell of the second vibration isolation plate.

5. The pipeline vibration isolation device according to claim 4, characterized in that: At least one shear nail is also provided inside the wall, one end of the shear nail is embedded in the wall, and the other end is connected to the partition.

6. The pipeline vibration isolation device according to claim 4, characterized in that: The first plate body and the second plate body are further provided with a flange on one side facing away from each other and a plurality of stiffening plates installed on the outer side of the flange; A plurality of stiffening plates are arranged at intervals around the outer circumference of the flange.

7. The pipeline vibration isolation device according to claim 4, characterized in that: A filling cavity is formed between the end of the first vibration isolation plate facing away from the sleeve and the wall, and the filling cavity is filled with flexible material.

8. The pipeline vibration isolation device according to claim 1, characterized in that: The second vibration isolation plate comprises a plurality of vibration isolation units, the plurality of vibration isolation units are evenly spaced and arranged around the outer circumference of the sleeve and installation gaps are formed between adjacent vibration isolation units; The installation gap is filled with a rotation-blocking member.

9. The pipeline vibration isolation device according to claim 8, characterized in that: The anti-rotation component includes an anti-rotation block and a sealing strip; One end of the anti-rotation block is connected to the sleeve, and the sealing strip is sealed at the other end of the anti-rotation block.

10. The pipeline vibration isolation device according to claim 1, characterized in that: The penetration piece is integrally arranged with the sleeve.