A wide frequency range rubber spring dynamic vibration absorber for nuclear power pipeline

Abstract

This invention belongs to the field of vibration absorption for nuclear power plant pipelines, specifically relating to a wide-frequency-range rubber spring dynamic vibration absorber for nuclear power pipeline vibration reduction. The absorber includes: a fixed frame and vibration-absorbing blocks. The fixed frame has a circular structure, with two sets of fixed frames arranged parallel and symmetrically. The vibration-absorbing blocks are located between the two sets of fixed frames, and a plurality of vibration-absorbing blocks are evenly distributed along the circumference of the fixed frames. Both ends of the vibration-absorbing blocks are detachably connected to the two sets of fixed frames, with a certain gap between the ends of the vibration-absorbing blocks and the fixed frames. The fixed frame is securely connected to the pipeline. The fixed frame clamps the pipeline, bears the vibration of the pipeline, and transmits the vibration to the vibration-absorbing blocks, which absorb the vibration and suppress the pipeline vibration. This invention's vibration absorber has a simple structure, is easy to assemble and disassemble, and can effectively suppress vibrations from all directions of the pipeline.

Description

Technical Field

[0001] This invention belongs to the field of vibration absorption of pipelines in nuclear power plants, and specifically relates to a wide-frequency-range rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines. Background Technology

[0002] The pipeline system of a power plant is a complex power structure. During normal operation of the unit, there are a large number of vibration sources in the pipeline system, such as pressure pulses when valves are opened and closed, changes in the opening of regulating valves, and various equipment connected to the pipeline system, such as pumps, steam turbines, and fans, can transmit vibrations. These vibrations can generate excessive displacement and stress, damage the pipeline system, and even cause malfunctions of critical and sensitive facilities.

[0003] Therefore, there is an urgent need to invent a pipeline vibration absorber that can suppress vibrations from multiple directions, taking into account the characteristics of pipeline vibrations in nuclear power plant units. Summary of the Invention

[0004] The purpose of this invention is to provide a wide-frequency-range rubber spring dynamic vibration absorber for nuclear power pipeline vibration reduction. This vibration absorber has a simple structure, is easy to assemble and disassemble, and can effectively suppress vibrations from all directions of the pipeline.

[0005] Technical solution to achieve the purpose of this invention:

[0006] A wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines includes: a fixed frame and vibration-absorbing blocks. The fixed frame is a circular structure, with two sets of fixed frames arranged parallel and symmetrically. The vibration-absorbing blocks are located between the two sets of fixed frames, and a plurality of vibration-absorbing blocks are evenly arranged along the circumference of the fixed frame. The two ends of the vibration-absorbing blocks are detachably connected to the two sets of fixed frames respectively, and a certain gap is left between the two ends of the vibration-absorbing blocks and the fixed frames. The fixed frame is tightly connected to the pipeline. The fixed frame clamps the pipeline, bears the vibration of the pipeline, and transmits the vibration to the vibration-absorbing blocks. The vibration-absorbing blocks absorb the vibration and suppress the vibration of the pipeline.

[0007] Furthermore, the vibration-absorbing block is detachably connected to the two sets of fixing frames via double-ended studs.

[0008] Furthermore, the fixing frame consists of two symmetrical semicircular structures, which are detachably connected to form a circular structure.

[0009] Furthermore, the two semicircular structures are detachably connected by bolts.

[0010] Furthermore, the vibration-absorbing block includes a rubber ring and a metal block. The rubber ring is embedded in both ends of the metal block. After the vibration absorber is installed, the rubber ring is located between the metal block and the fixing frame.

[0011] Furthermore, the metal block is made of tungsten-based heavy alloy.

[0012] Furthermore, the rubber ring is made of neoprene rubber.

[0013] Furthermore, the fixing frame is made of structural steel.

[0014] The beneficial technical effects of this invention are as follows:

[0015] 1. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for nuclear power pipeline vibration reduction, which can effectively suppress low-frequency vibration of pipeline and realize the vibration absorption function of pipeline.

[0016] 2. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines. The dynamic vibration absorber has a good suppression effect on low frequencies and has high application value for vibration absorption of pipelines.

[0017] 3. In the wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines provided by the present invention, the fixing frame adopts a parallel installation structure, which has a certain rigidity and provides a certain support for the pipeline.

[0018] 4. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for nuclear power pipeline vibration reduction. By designing a rubber ring in the vibration absorption block, the vibration of the pipeline can be effectively suppressed.

[0019] 5. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines. Compared with other vibration absorbers, the embedded rubber ring replaces the spring damper to transmit vibration, which can reduce the vibration amplitude of the metal block on the one hand, and make the structure more compact on the other hand.

[0020] 6. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines. Since the metal block can make small displacements along the axial and lateral directions, and four sets of vibration absorber blocks are installed in parallel, the vibration absorber can effectively suppress axial and lateral vibrations.

[0021] 7. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines. It is a quadruple vibration absorber structure with a large frequency absorption range, which effectively suppresses multi-directional vibrations and eliminates the cumbersome frequency tuning steps.

[0022] 8. The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines, which adopts a pipe clamp installation method, has a compact structure, light weight, simple structure, and is easy to install and disassemble. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a wide-frequency-range rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines provided by the present invention;

[0024] Figure 2 This is a cross-sectional view of the vibration-absorbing block in a wide-frequency-range rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines provided by the present invention.

[0025] In the diagram: 1. Fixing frame; 2. Vibration damping block; 3. Double-ended stud; 2-1. Rubber ring; 2-2. Metal block. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, the present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power pipelines, comprising: a fixed frame 1, a vibration absorbing block 2, and a double-ended stud 3.

[0028] The fixing frame 1 has a circular structure and is made of structural steel. The two sets of fixing frames 1 are arranged in parallel and symmetrically. The vibration absorbing blocks 2 are located between the two sets of fixing frames 1, and several vibration absorbing blocks 2 are evenly arranged along the circumference of the fixing frame 1. The vibration absorbing blocks 2 are detachably connected to the two sets of fixing frames 1 by double-headed studs 3.

[0029] The fixing frame 1 consists of two symmetrical semicircular structures, which are detachably connected by bolts to form a circular structure. The two semicircular fixing frames 1 are fastened to the pipe by bolts. The fixing frame 1 has a certain rigidity and can support the pipe. The vibration absorbing block 2 has a certain gap between its two ends and the fixing frame 1. When vibration occurs, the vibration absorbing block 2 can produce a small movement, giving it the freedom of axial movement.

[0030] In a specific implementation, four vibration-absorbing blocks 2 are symmetrically distributed between the two sets of fixed frames 1 to ensure that vibrations from all parts of the pipeline can be received.

[0031] like Figure 2 As shown, the vibration absorber 2 includes a rubber ring 2-1 and a metal block 2-2. The metal block 2-2 is made of tungsten-based heavy alloy, and the rubber ring 2-1 is made of neoprene rubber. The rubber ring 2-1 is embedded in both ends of the metal block 2-2. After the vibration absorber is installed, the rubber ring 2-1 is located between the metal block 2-2 and the fixing frame 1. There is friction between the rubber ring 2-1 and the double-ended stud 3, and between the rubber ring 2-1 and the metal block 2-2. When the pipeline vibrates, the fixing frame 1 provides a certain degree of support, limiting the displacement of the pipeline to some extent. At the same time, the vibration of the pipeline is transmitted to the metal block 2-2, which compresses the rubber ring 2-2, causing a slight displacement of the metal block 2-2. The characteristics of the rubber ring 2-1 ensure that the displacement of the metal block 2-2 is not too large, while dissipating energy and achieving the effect of vibration absorption.

[0032] When vibration occurs, the fixed frame 1 will bear a certain load, and at the same time, the fixed frame 1 will transmit the vibration to the metal block 2-2. The metal block 2-2 will squeeze the rubber ring 2-1, and the rubber ring 2-1 will displace the metal block 2-2, thus achieving the effect of vibration absorption.

[0033] Compared with the spring-mass block combination of other vibration absorbers, the combination of rubber ring 2-1 and metal block 2-2 has an embedded structure that allows the metal block to absorb vibration with a smaller displacement, making the structure more stable and compact.

[0034] The present invention provides a wide-frequency domain rubber spring dynamic vibration absorber for vibration reduction of nuclear power plant pipelines, the working principle of which is as follows:

[0035] like Figure 1-2 As shown, each vibration-absorbing block 2 is a vibration-absorbing unit. Because the vibration-absorbing blocks 4 have gaps during installation, they can generate axial and lateral displacements. Each vibration-absorbing block 2 includes a rubber ring 2-1 and a metal block 2-2. The rubber ring 2-1 is embedded in both ends of the metal block 2-2, allowing the vibration-absorbing blocks to maintain balance when there is no vibration. Since the rubber ring 2-1 is embedded in the metal block 2-2, it hinders the displacement of the metal block 2-2, preventing excessive displacement. The rubber ring also has a vibration-absorbing effect, suppressing low-frequency vibrations of the pipeline. When the pipeline vibrates, because the fixing frame 1 is divided into two groups and installed parallel to the pipeline, it can transmit vibrations in all directions. Since the fixing frame 1 is tightly connected to the pipeline, the pipeline and the fixing frame 1 are relatively stationary. The vibration is transmitted to the vibration-absorbing blocks 2. The metal block 2-2, due to its gaps, will vibrate. The rubber ring 2-1 absorbs the vibration, reducing the vibration of the metal block 2-2 and achieving the vibration-absorbing effect. Therefore, this dynamic vibration absorber suppresses low-frequency vibrations of the pipeline and has a very good vibration suppression effect.

[0036] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. All contents not described in detail in the present invention can be derived from existing technologies.

Claims

1. A broadband rubber spring dynamic vibration absorber for nuclear piping vibration reduction, characterized by, The vibration absorber comprises a fixed frame (1) and a vibration absorbing block (2), the fixed frame (1) is in a circular structure, two groups of fixed frames (1) are arranged in parallel and symmetrically, the vibration absorbing block (2) is located between the two groups of fixed frames (1) and is uniformly provided with a plurality of vibration absorbing blocks (2) along the circumferential direction of the fixed frame (1), the two ends of the vibration absorbing block (2) are detachably connected with the two groups of fixed frames (1), a certain gap is left between the two ends of the vibration absorbing block (2) and the fixed frame (1), and the fixed frame (1) is tightly connected with the pipeline; the pipeline is clamped by the fixed frame (1), the fixed frame (1) bears the vibration of the pipeline and transmits the vibration to the vibration absorbing block (2), the vibration absorbing block (2) completes the vibration absorption, and the vibration of the pipeline is inhibited; the material of the fixed frame (1) is structural steel; the vibration absorbing block (2) is detachably connected with the two groups of fixed frames (1) through double-headed studs (3); the vibration absorbing block (2) comprises a rubber ring (2-1) and a metal block (2-2), the rubber ring (2-1) is embedded in the two ends of the metal block (2-2), and the rubber ring (2-1) is located between the metal block (2-2) and the fixed frame (1) after the vibration absorber is installed; each vibration absorbing block (2) is a vibration absorbing unit, the vibration absorbing block (2) can produce axial and transverse displacement due to the gap left during installation, the rubber ring (2-1) is embedded in the two ends of the metal block (2-2), so that the vibration absorbing block can keep balance when the vibration absorber is not vibrating; when the pipeline vibrates, the fixed frame (1) is divided into two groups and is installed in parallel on the pipeline, so that the vibration in each direction can be transmitted, the pipeline and the fixed frame (1) are relatively stationary due to the tight connection between the fixed frame (1) and the pipeline, the vibration is transmitted to the vibration absorbing block (2), the metal block (2-2) vibrates due to the gap, the rubber ring (2-1) absorbs the vibration, the vibration of the metal block (2-2) is reduced, and the effect of absorbing vibration is achieved.

2. A wide frequency band rubber spring dynamic vibration absorber for nuclear power piping vibration reduction according to claim 1, characterized by, The fixed frame (1) is in a symmetrical semicircular structure, and the two semicircular structures are detachably connected to form a circular structure.

3. A broadband rubber spring dynamic vibration absorber for nuclear power piping vibration reduction according to claim 2, characterized in that, The two semicircular structures are detachably connected through bolts.

4. A broadband rubber spring dynamic vibration absorber for nuclear power piping vibration reduction according to claim 3, characterized in that, The material of the metal block (2-2) is tungsten-based heavy alloy.

5. A broadband rubber spring dynamic vibration absorber for nuclear power piping vibration reduction according to claim 1, wherein The material of the rubber ring (2-1) is neoprene.

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