Anti-vibration support hanger for nuclear power

Abstract

The present application relates to the technical field of anti-vibration support hanger, and discloses an anti-vibration support hanger for nuclear power, which comprises a mounting plate, a stand column fixedly installed at the bottom of the mounting plate, a shockproof cover fixedly installed at the bottom of the stand column, and a damping mechanism fixedly installed at the top of the shockproof cover; the damping mechanism comprises a fixing box and a sliding column; a supporting spring is arranged at the bottom of the damper to support the damper, thereby supporting a fixing ring in the damper, so that the supporting spring can support the fixing ring and further support the sliding column; a second supporting spring is arranged to assist the first supporting spring in supporting the damper when the first supporting spring is excessively compressed; and a limiting column is arranged to set the maximum compression length of the first and second supporting springs, so as to avoid the first and second supporting springs from being excessively compressed, and the damper can still dampen the horizontal vibration.

Description

Technical Field

[0001] This invention relates to the field of vibration-resistant support technology, specifically a vibration-resistant support for nuclear power plants. Background Technology

[0002] Hangers are widely used to fix various exhaust pipes in ships, nuclear power plant nuclear islands, etc., to prevent the pipes from sagging, bending, vibrating, etc., thus preventing damage to the pipes or the failure of the tightness of the pipe joints. However, the existing hangers have weak load-bearing capacity. Under the interference of external vibration, the hung pipes or other components are prone to cracking or downward deformation of the connectors on the hangers due to their weak load-bearing capacity. They have low safety performance and low impact resistance. Chinese patent CN207621259U discloses a vibration-resistant pipe support. This vibration-resistant pipe support buffers the horizontal vibration between the sliding column and the anti-vibration cover by setting a washer, reducing the probability of the support being deformed by vibration. By adding a spring to the washer, the buffering effect of the washer is further improved. However, the aforementioned anti-vibration pipe supports connect the sliding column and the washer ring together using springs and elastic rubber rods. However, both the springs and the elastic rubber rods are prone to deformation under stress, which in turn changes the vertical position of the sliding column. When liquid flows into the pipe, the weight of the pipe increases, which can easily cause the sliding column to move downward, thereby causing the springs and rubber rods to deform. This can easily lead to elastic fatigue of the springs and rubber rods, resulting in the springs and rubber rods losing their effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide a vibration-resistant support for nuclear power plants to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vibration-resistant support for nuclear power plants, comprising a mounting plate, a column fixedly mounted on the bottom of the mounting plate, a shock-absorbing cover fixedly mounted on the bottom of the column, and a vibration damping mechanism fixedly mounted on the top of the shock-absorbing cover; The shock absorption mechanism includes a fixed box and a sliding column. The fixed box is fixedly installed on the top of the shockproof cover. A first support spring is fixedly installed on the bottom inner wall of the fixed box. A shock absorber is fixedly installed on the top of the first support spring. The sliding column is movably disposed inside the fixed box. A fixing ring is fixedly sleeved on the outer wall of the sliding column. The fixing ring is slidably disposed inside the shock absorber. The bottom and top ends of the sliding column extend from through grooves at the bottom and top of the fixed box, respectively. The outer diameter of the sliding column is smaller than the inner diameter of the through groove. The outer diameter of the fixing ring is larger than the inner diameter of the through groove. A second support spring is fixedly installed on the bottom inner wall of the fixed box. The length of the second support spring is smaller than the length of the first support spring. A limit post is fixedly installed on the bottom inner wall of the fixed box. The length of the limit post is smaller than the length of the second support spring. A support plate is fixedly installed at the bottom end of the sliding column. A U-shaped frame is fixedly installed at the bottom of the support plate by bolts. The outer wall of the support plate is provided with a connecting mechanism.

[0005] Furthermore, the connecting mechanism includes a U-shaped plate, a U-shaped guide rail fixedly installed at the bottom end of the U-shaped plate, the U-shaped guide rail slidably sleeved on the support plate, a connecting rod slidably installed on the inner wall of the U-shaped plate, a connecting spring slidably sleeved on the outer wall of the connecting rod, the top end of the connecting spring being fixedly connected to the bottom of the mounting plate, the bottom end of the connecting spring being fixedly connected to the top of the U-shaped plate, and the connecting rod movably passing through the bottom of the mounting plate and the top of the shockproof cover.

[0006] Furthermore, the shock absorber includes an outer casing, which is slidably disposed within a fixed box. A clearance groove is provided at the bottom of the outer casing, the inner diameter of which is the same as the inner diameter of the through groove. A damper is fixedly installed on the inner wall of the outer casing, and an arc-shaped plate is fixedly installed on the end of the damper away from the inner wall of the outer casing. The outer wall of the arc-shaped plate away from the damper contacts the outer wall of the fixed ring.

[0007] Furthermore, limiting protrusions are fixedly installed at both the top and bottom of the connecting rod, and the limiting protrusions are fixedly connected to the connecting rod by bolts.

[0008] Furthermore, an arc-shaped plate is fixedly installed at the bottom of the support plate, and two U-shaped frames are provided, which are symmetrically distributed about the center of the support plate. There are two arc-shaped plates, which correspond one-to-one with the U-shaped frames.

[0009] Furthermore, a fixing sleeve is fixedly fitted on the outer wall of the sliding column, and a groove is formed on the outer wall of the fixing sleeve. A retaining ring is slidably arranged on the inner wall of the groove. A damper second is fixedly installed on the top of the retaining ring, and an installation ring is fixedly installed on the top of the damper second. The installation ring is fixedly installed on the bottom of the mounting plate.

[0010] Furthermore, a circular slide rail is fixedly installed on the top of the fixed box, a slider is slidably arranged on the inner wall of the circular slide rail, a sliding frame is fixedly installed on the top of the slider, a damper three is fixedly installed on the outer wall of the sliding frame, an arc-shaped plate two is fixedly installed on the end of the damper three away from the sliding frame, and the side of the arc-shaped plate two away from the damper three faces the sliding column.

[0011] Furthermore, four dampers are provided, and they are arranged in a circumferential array inside the outer casing.

[0012] Furthermore, the distance between the second arc-shaped piece and the sliding column is greater than the distance between the first arc-shaped piece and the fixing ring.

[0013] Furthermore, a rubber sleeve is slidably fitted on the outer wall of the U-shaped plate, and the rubber sleeve is fixedly installed on the inner wall of the shockproof cover. L-shaped baffles are fixedly installed on the front and back outer walls of the U-shaped guide rail.

[0014] Compared with the prior art, the beneficial effects of the present invention are: A pair of support springs are installed at the bottom of the shock absorber to support the shock absorber, and in turn, to support the fixed ring inside the shock absorber. This allows the support spring one to support the fixed ring, and in turn, to support the sliding column. A support spring two is installed to assist the support spring pair in supporting the shock absorber when the support spring one is over-compressed. A limit post is installed to set the maximum compression length of the support spring one and the support spring two, so as to prevent the support spring one and the support spring two from being over-compressed, while still being able to dampen horizontal vibrations through the shock absorber. The U-shaped plate is connected to the mounting plate by connecting rods and connecting springs, so that the U-shaped guide rail can provide upward support for the connecting rods. L-shaped baffles are fixedly installed on the front and back outer walls of the U-shaped guide rail. When the mounting plate 1 is installed on the side wall and not on the top wall, the L-shaped baffles can support the support plate, ensuring that the U-shaped guide rail can transmit force to the support plate. Damper 2 is set to reduce the vibration in the vertical direction of the sliding column. Through the sliding connection between the retaining ring and the mounting ring, when the sliding column is subjected to horizontal vibration and moves horizontally, the mounting ring will not hinder the horizontal movement of the sliding column. When the mounting plate is installed on the side wall and not the top wall, the sliding column will move downward under the action of gravity, thereby squeezing the arc-shaped plate one in one direction. At this time, by vibrating the position of the sliding frame, the arc-shaped plate two vibrates to the bottom of the sliding column, and the arc-shaped plate two is used to dampen the sliding column, so as to avoid the individual damper one being over-compressed and damaged. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a schematic diagram of the shock absorption mechanism of the present invention; Figure 3 This is a schematic diagram of the structure of the bottom of the shock-absorbing cover of the present invention (view from below). Figure 4 This is a schematic diagram of the connection mechanism of the present invention; Figure 5 This is a structural schematic diagram of the front sectional view of the fixing box of the present invention; Figure 6 This is a schematic diagram of the exploded view of the retaining ring and mounting ring of the present invention; Figure 7 This is a schematic diagram of the exploded view of the internal structure of the fixing box of the present invention; Figure 8 This is a schematic diagram of the structure of the circular slide rail and the arc-shaped plate of the present invention.

[0016] In the diagram: 1. Mounting plate; 2. Column; 3. Vibration damping cover; 4. Shock absorption mechanism; 401. Fixing box; 402. Support plate; 403. U-shaped frame; 404. Through groove; 405. Sliding column; 406. Fixing ring; 407. Support spring one; 408. Support spring two; 409. Limiting column; 4010. Shock absorber; 40101. Outer shell; 40102. Clearance groove; 40103. Arc-shaped piece one; 4 0104. Damper 1; 5. Connecting mechanism; 501. U-shaped plate; 502. Connecting rod; 5021. Limiting protrusion; 503. Connecting spring; 504. U-shaped guide rail; 6. Arc plate; 7. Rubber sleeve; 8. L-shaped baffle; 9. Fixing sleeve; 10. Retaining ring; 11. Damper 2; 12. Mounting ring; 13. Circular slide rail; 14. Slider; 15. Sliding frame; 16. Damper 3; 17. Arc plate 2. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Please see Figures 1-8 The present invention provides a technical solution: a vibration-resistant support for nuclear power plants, comprising a mounting plate 1, a column 2 fixedly mounted on the bottom of the mounting plate 1, a shock-absorbing cover 3 fixedly mounted on the bottom of the column 2, and a shock-absorbing mechanism 4 fixedly mounted on the top of the shock-absorbing cover 3; The shock absorption mechanism 4 includes a fixed box 401 and a sliding column 405. The fixed box 401 is fixedly installed on the top of the shockproof cover 3. A support spring 407 is fixedly installed on the bottom inner wall of the fixed box 401, and a shock absorber 4010 is fixedly installed on the top of the support spring 407. The sliding column 405 is movably disposed inside the fixed box 401. A fixing ring 406 is fixedly sleeved on the outer wall of the sliding column 405. The fixing ring 406 is slidably disposed inside the shock absorber 4010. The bottom and top ends of the sliding column 405 extend from the through grooves 404 at the bottom and top of the fixed box 401, respectively. The outer diameter of the sliding column 405 is smaller than the inner diameter of the through groove 404, and the outer diameter of the fixing ring 406 is larger than the inner diameter of the through groove 404. The bottom inner wall of the fixed box 401 is fixedly installed with a support spring 407. A second support spring 408 is installed, the length of which is less than the length of the first support spring 407. A limit post 409 is fixedly installed on the bottom inner wall of the fixed box 401, the length of which is less than the length of the second support spring 408. A support plate 402 is fixedly installed at the bottom end of the sliding column 405. A U-shaped frame 403 is fixedly installed at the bottom of the support plate 402 by bolts. The pipe is connected to the shock absorber cover 3 through the fixed box 401, sliding column 405, fixing ring 406, support plate 402, and U-shaped frame 403. A first support spring 407 is set at the bottom of the shock absorber 4010 to support the shock absorber 4010, thereby supporting the fixing ring 406 inside the shock absorber 4010, so that the support spring... Spring 407 supports the fixed ring 406, which in turn supports the sliding column 405. A second support spring 408 is provided to assist the first support spring 407 in supporting the shock absorber 4010 when it is over-compressed. A limiting post 409 is provided to set the maximum compression length of the first and second support springs 407 and 408, preventing them from being over-compressed. A through slot 404 allows external vibrations to cause the sliding column 405 to shift relative to the fixed box 401. When the fixed ring 406 and the sliding column 405 vibrate together, the shock absorber 4010 operates to dampen the vibration. The shock absorber 4010 includes an outer casing 40101. The outer casing 40101 is slidably disposed inside the fixed casing 401. The bottom of the outer casing 40101 is provided with a relief groove 40102. The inner diameter of the relief groove 40102 is the same as the inner diameter of the through groove 404. A damper 40104 is fixedly installed on the inner wall of the outer casing 40101. An arc-shaped piece 40103 is fixedly installed on the end of the damper 40104 away from the inner wall of the outer casing 40101. The outer wall of the arc-shaped piece 40103 away from the damper 40104 contacts the outer wall of the fixed ring 406. Four dampers 40104 are provided and are distributed in a circumferential array inside the outer casing 40101. The four dampers 40104 are used to reduce the vibration in multiple directions during the vibration of the sliding column 405. A connecting mechanism 5 is provided on the outer wall of the support plate 402. The connecting mechanism 5 includes a U-shaped plate 501. A U-shaped guide rail 504 is fixedly installed at the bottom end of the U-shaped plate 501. The U-shaped guide rail 504 is slidably sleeved on the support plate 402. A connecting rod 502 is slidably arranged on the inner wall of the U-shaped plate 501. A connecting spring 503 is slidably sleeved on the outer wall of the connecting rod 502. The top end of the connecting spring 503 is fixedly connected to the bottom of the mounting plate 1, and the bottom end of the connecting spring 503 is fixedly connected to the top of the U-shaped plate 501. The connecting rod 502 is movable. The U-shaped plate 501 is connected to the mounting plate 1 through the bottom of the mounting plate 1 and the top of the shockproof cover 3 via the connecting rod 502 and the connecting spring 503, so that the U-shaped guide rail 504 can provide upward support for the connecting rod 502. The top and bottom ends of the connecting rod 502 are fixedly installed with limit protrusions 5021, which are fixedly connected to the connecting rod 502 by bolts. The limit protrusions 5021 limit the connecting rod 502 and prevent the connecting rod 502 from detaching from the mounting plate 1 and the shockproof cover 3. An arc-shaped plate 6 is fixedly installed at the bottom of the support plate 402. Two U-shaped frames 403 are provided and are symmetrically distributed about the center of the support plate 402. Two arc-shaped plates 6 are provided and correspond one-to-one with the U-shaped frames 403, which increases the contact area with the pipeline and improves the connection stability of the pipeline. A fixing sleeve 9 is fixedly fitted on the outer wall of the sliding column 405. The outer wall of the fixing sleeve 9 has a groove, and a retaining ring 10 is slidably installed on the inner wall of the groove. A damper 11 is fixedly installed on the top of the retaining ring 10, and an installation ring 12 is fixedly installed on the top of the damper 11. The installation ring 12 is fixedly installed on the bottom of the mounting plate 1. The damper 11 is set to reduce the vibration of the sliding column 405 in the vertical direction. Through the sliding connection between the retaining ring 10 and the installation ring 12, when the sliding column 405 is subjected to horizontal vibration and moves horizontally, the installation ring 12 will not hinder the horizontal movement of the sliding column 405. A circular slide rail 13 is fixedly installed on the top of the fixed box 401. A slider 14 is slidably arranged on the inner wall of the circular slide rail 13. A sliding frame 15 is fixedly installed on the top of the slider 14. A damper 16 is fixedly installed on the outer wall of the sliding frame 15. An arc-shaped plate 17 is fixedly installed on the end of the damper 16 away from the sliding frame 15. The side of the arc-shaped plate 17 away from the damper 16 faces the sliding column 405. The distance between the arc-shaped plate 17 and the sliding column 405 is greater than that between the arc-shaped plate 17 and the sliding column 405. The gap between 0103 and the fixing ring 406, when the mounting plate 1 is installed on the side wall and not on the top wall, the sliding column 405 will move down under the action of gravity, thereby squeezing the arc-shaped piece 40103 in a single direction. At this time, by vibrating the position of the sliding frame 15, the arc-shaped piece 17 vibrates to the bottom of the sliding column 405, and the arc-shaped piece 17 is used to dampen the sliding column 405, so as to avoid the individual damper 40104 being over-compressed and damaged. A rubber sleeve 7 is slidably fitted on the outer wall of the U-shaped plate 501. The rubber sleeve 7 is fixedly installed on the inner wall of the shockproof cover 3, so that when the U-shaped plate 501 vibrates relative to the shockproof cover 3, the rubber sleeve 7 can be deformed by squeezing it, thus preventing the U-shaped plate 501 from directly colliding with the inner wall of the shockproof cover 3 during vibration. L-shaped baffles 8 are fixedly installed on the front and back outer walls of the U-shaped guide rail 504. When the mounting plate 1 is installed on the side wall and not on the top wall, the L-shaped baffles 8 can support the support plate 402, ensuring that the U-shaped guide rail 504 effectively transmits force to the support plate 402.

[0019] Working Principle: During operation, after liquid enters the pipeline, gravity pulls the U-shaped frame 403, support plate 402, and sliding column 405 downwards, causing the fixed ring 406 to move downwards. The downward movement of the fixed ring 406 causes the shock absorber 4010 to move downwards, compressing the first support spring 407. After the shock absorber 4010 contacts the second support spring 408, it continues to compress it. When the liquid in the pipeline is too heavy, causing the second support spring 408 to continue moving downwards, it will eventually move until the shock absorber 4010 contacts the second support spring 408. When the pipeline experiences horizontal vibration, the vibration is transmitted to the sliding column 405, causing it to vibrate horizontally. This, in turn, causes the fixed ring 406 to vibrate horizontally. During this vibration, the fixed ring 406 pushes the arc-shaped plate 40103, triggering the damping mechanism. Damper 40104 absorbs the kinetic energy of vibrations to achieve shock absorption. When vertical vibration occurs, the sliding column 405 vibrates up and down, causing the retaining ring 10 to vibrate up and down. During the up and down vibration of the retaining ring 10, the mounting ring 12 will vibrate up and down, thereby triggering the second damper 11 to work and absorb the kinetic energy of the vibrations to achieve shock absorption. During the downward movement of the support plate 402 due to the weight of the pipe, the U-shaped guide rail 504 will move down, which will cause the U-shaped plate 501 to move down. During the downward movement of the U-shaped plate 501, the connecting spring 503 will be stretched, providing an upward pulling force to the U-shaped plate 501, which in turn provides an upward supporting force to the support plate 402. This prevents the support plate 402 from moving down too far, which would cause the shock absorber 4010 to move down too far, and thus prevents the shock absorber 4010 from excessively compressing the support spring 407 and the second support spring 408.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A vibration-resistant support bracket for nuclear power plants, comprising a mounting plate (1), characterized in that: A column (2) is fixedly installed at the bottom of the mounting plate (1), a shockproof cover (3) is fixedly installed at the bottom of the column (2), and a shock-absorbing mechanism (4) is fixedly installed at the top of the shockproof cover (3). The shock absorption mechanism (4) includes a fixed box (401) and a sliding column (405). The fixed box (401) is fixedly installed on the top of the shockproof cover (3). A support spring (407) is fixedly installed on the bottom inner wall of the fixed box (401). A shock absorber (4010) is fixedly installed on the top of the support spring (407). The sliding column (405) is movably disposed inside the fixed box (401). A fixing ring (406) is fixedly sleeved on the outer wall of the sliding column (405). The fixing ring (406) is slidably disposed inside the shock absorber (4010). The bottom and top ends of the sliding column (405) are respectively connected to the through slots (404) at the bottom and top of the fixed box (401). The sliding column (405) extends inward, and its outer diameter is smaller than the inner diameter of the through groove (404). The outer diameter of the fixing ring (406) is larger than the inner diameter of the through groove (404). A second support spring (408) is fixedly installed on the bottom inner wall of the fixing box (401). The length of the second support spring (408) is smaller than the length of the first support spring (407). A limit post (409) is fixedly installed on the bottom inner wall of the fixing box (401). The length of the limit post (409) is smaller than the length of the second support spring (408). A support plate (402) is fixedly installed at the bottom end of the sliding column (405). A U-shaped frame (403) is fixedly installed at the bottom of the support plate (402) by bolts. The outer wall of the support plate (402) is provided with a connecting mechanism (5), the connecting mechanism (5) includes a U-shaped plate (501), the bottom end of the U-shaped plate (501) is fixedly installed with a U-shaped guide rail (504), the U-shaped guide rail (504) is slidably sleeved on the support plate (402), the inner wall of the U-shaped plate (501) is slidably provided with a connecting rod (502), the outer wall of the connecting rod (502) is slidably sleeved with a connecting spring (503), the top end of the connecting spring (503) is fixedly connected to the bottom of the mounting plate (1), the bottom end of the connecting spring (503) is fixedly connected to the top of the U-shaped plate (501), and the connecting rod (502) moves through the bottom of the mounting plate (1) and the top of the shockproof cover (3); The outer wall of the sliding column (405) is fixedly fitted with a fixing sleeve (9). The outer wall of the fixing sleeve (9) is provided with a groove, and the inner wall of the groove is slidably provided with a retaining ring (10). The top of the retaining ring (10) is fixedly installed with a damper two (11). The top of the damper two (11) is fixedly installed with an installation ring (12). The installation ring (12) is fixedly installed at the bottom of the mounting plate (1). The top of the fixing box (401) is fixedly installed with a circular slide rail (13). The inner wall of the circular slide rail (13) is slidably provided with a slider (14). The top of the slider (14) is fixedly installed with a sliding frame (15). The outer wall of the sliding frame (15) is fixedly installed with a damper three (16). The end of the damper three (16) away from the sliding frame (15) is fixedly installed with an arc-shaped piece two (17). The side of the arc-shaped piece two (17) away from the damper three (16) faces the sliding column (405).

2. The vibration-resistant support bracket for nuclear power plants according to claim 1, characterized in that: The shock absorber (4010) includes an outer shell (40101), which is slidably disposed inside a fixed box (401). A clearance groove (40102) is provided at the bottom of the outer shell (40101), and the inner diameter of the clearance groove (40102) is the same as the inner diameter of the through groove (404). A damper (40104) is fixedly installed on the inner wall of the outer shell (40101). An arc-shaped piece (40103) is fixedly installed at one end of the damper (40104) away from the inner wall of the outer shell (40101). The outer wall of the arc-shaped piece (40103) away from the damper (40104) contacts the outer wall of the fixed ring (406).

3. The vibration-resistant support bracket for nuclear power plants according to claim 1, characterized in that: Limiting protrusions (5021) are fixedly installed at both the top and bottom of the connecting rod (502), and the limiting protrusions (5021) are fixedly connected to the connecting rod (502) by bolts.

4. The vibration-resistant support bracket for nuclear power plants according to claim 1, characterized in that: An arc-shaped plate (6) is fixedly installed at the bottom of the support plate (402). There are two U-shaped frames (403), which are symmetrically distributed about the center of the support plate (402). There are two arc-shaped plates (6), which correspond one-to-one with the U-shaped frames (403).

5. A vibration-resistant support bracket for nuclear power plants according to claim 2, characterized in that: Four dampers (40104) are provided and are arranged in a circumferential array inside the outer casing (40101).

6. A vibration-resistant support for nuclear power plants according to claim 2, characterized in that: The distance between the second arc-shaped piece (17) and the sliding column (405) is greater than the distance between the first arc-shaped piece (40103) and the fixing ring (406).

7. A vibration-resistant support bracket for nuclear power plants according to claim 1, characterized in that: The outer wall of the U-shaped plate (501) is fitted with a rubber sleeve (7), which is fixedly installed on the inner wall of the shockproof cover (3). The front and back outer walls of the U-shaped guide rail (504) are fixedly fitted with L-shaped baffles (8).

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