Viscous damper convenient to limit

Abstract

The viscous damper convenient to limit comprises an upper connecting plate and a lower connecting plate which are arranged oppositely, a plunger is fixedly connected to the lower portion of the upper connecting plate, a shell is fixedly connected to the upper portion of the lower connecting plate, a sealing body fixedly connected with the upper connecting plate is connected to the upper end of the shell, and a damping body is fixedly connected to the lower end of the plunger. A plurality of buffering holes are formed in the axial direction and the lower portion of the damping body, and damping liquid is arranged between the damping body and the shell. According to the viscous damper, the displacement value of the pipeline can be limited while the vibration of the pipeline is reduced, large displacement of the pipeline is prevented, secondary stress of the pipeline is avoided, the reliability of the pipeline is improved, kinetic energy borne by the damping body can be converted into kinetic energy of the vibration reduction particles, the vibration reduction effect of the viscous damper during high-frequency vibration of the pipeline is improved, and the service life of the pipeline is prolonged. And safe use of the pipeline is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to viscous damper technical field especially relates to a viscous damper convenient to limit. BACKGROUND

[0002] Pipeline system is widely used in thermal power plant, nuclear power plant, chemical industry, ship and other fields, in the operation process, due to the sudden change of liquid velocity in the pipeline, the pressure in the pipeline will rapidly rise or fall, the vibration phenomenon usually occurs in the pipeline, due to the complex composition of the pipeline system, it is difficult to eliminate vibration from the source of vibration. Long-term pipeline vibration can greatly shorten the service life of the pipeline, therefore, it is necessary to carry out vibration reduction on the pipeline, and then ensure the safe operation of the pipeline system. Viscous damper is a general equipment for pipeline vibration reduction, the principle of viscous damper vibration reduction is to consume the vibration kinetic energy of the pipeline through the deformation of damping liquid, and the vibration kinetic energy is converted into the heat energy of damping liquid, thereby reducing the adverse effects of vibration on the pipeline.

[0003] After the viscous damper is installed in the pipeline, it can reduce the vibration of the pipeline in real time and ensure the normal operation of the pipeline. However, long-term pipeline vibration or shaking can cause the pipeline to produce a large displacement in a certain direction, and the traditional viscous damper moves along with the displacement of the pipeline, and excessive displacement can intensify the stress concentration at the welding position of the pipeline, which is easy to cause cracks in the pipeline during vibration or damage the pipeline. At the same time, when the pipeline produces some high-frequency vibration, the damping effect of the viscous damper will decrease, thereby affecting the damping effect of the viscous damper on the pipeline, which is not conducive to the normal operation of the pipeline. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the technical problems that the existing viscous damper moves along with the displacement of the pipeline, the excessive displacement intensifies the stress concentration at the welding position of the pipeline, which is easy to cause cracks in the pipeline and damage the pipeline, and the high-frequency vibration causes the damping effect of the viscous damper to decrease, the utility model provides the following technical scheme.

[0005] The utility model discloses a viscous damper convenient to limit, which comprises oppositely arranged upper connecting plates and lower connecting plates, the lower part of the upper connecting plate is fixedly connected with a plunger, the upper part of the lower connecting plate is fixedly connected with a shell, the upper end of the shell is connected with a sealing body fixedly connected with the upper connecting plate, the lower end of the plunger is fixedly connected with a damping body, the damping body is axially and at the lower part provided with a plurality of buffer holes, and damping liquid is arranged between the damping body and the shell.

[0006] As a further technical scheme, the inner wall of the shell is in the structure of a gourd, the shape of the outer wall of the damping body matches the shape of the inner wall of the shell, and the damping liquid is filled between the outer wall of the damping body and the inner wall of the shell.

[0007] As a further technical solution, the damping body is a hollow structure, and the damping body is filled with a plurality of damping particles.

[0008] As a further technical solution, the damping particles are elastic spheres with different sizes.

[0009] As a further technical solution, the damping body is a honeycomb structure.

[0010] As a further technical solution, the plunger and the sealing body are filled with damping liquid.

[0011] The utility model discloses a viscous damper which is provided with a gourd-shaped damping body in a gourd-shaped shell body, and the damping body and the shell body are filled with damping liquid. The viscous damper can limit the displacement of the pipeline while damping the pipeline, prevent the pipeline from having large displacement, avoid the pipeline from generating secondary stress, and improve the reliability of the pipeline. The damping body below the plunger is provided with damping particles. When the viscous damper is vibrated, the damping particles collide with each other, convert the kinetic energy of the damping body into the kinetic energy of the damping particles, improve the damping effect of the viscous damper when the pipeline is vibrated at high frequency, and ensure the safe use of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the plane cut structure schematic diagram of the viscous damper convenient to limit of the utility model;

[0013] Figure 2 is the cut schematic diagram of the viscous damper convenient to limit of the utility model A-A direction;

[0014] In the drawing: 1 - upper connecting plate;2 - plunger;3 - sealing body;4 - damping body;5 - buffer hole;6 - shell body;7 - damping particle;8 - damping liquid;9 - lower connecting plate. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model. It should be noted that the examples in the utility model and the features in the examples can be combined with each other without conflict.

[0016] In the description of the utility model, need understanding is, the term "upper", "lower" based on the orientation or positional relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0017] As Figure 1 And Figure 2 The utility model discloses a convenient viscous damper of limiting, including the upper connecting plate 1 and lower connecting plate 9 of opposite setting, the upper connecting plate 1 lower part fixedly connected with plunger 2. The upper connecting plate 1 is used for connecting pipe clamp and pipe support part, and the lower connecting plate 9 is used for connecting to fixed support, and plunger 2 moves with the upper connecting plate 1 and transmits vibration to each direction of lower part.

[0018] In a preferred embodiment, the lower connecting plate 9 upper part fixedly connected with the shell 6, the shell 6 is hollow structure, the shell 6 upper end is connected with sealing body 3, and sealing body 3 is fixedly connected with the upper connecting plate 1, and thus, the upper connecting plate 1, the lower connecting plate 9, the shell 6 and sealing body 3 form a closed space. The inner wall of shell 6 is the structure of gourd shape, which contains damping body 4, damping body 4 can reduce vibration and prevent the displacement of pipeline.

[0019] Specifically, the lower end of plunger 2 is fixedly connected with damping body 4, damping body 4 is located in the inner cavity of shell 6, and there is a gap between damping body 4 and shell 6, damping body 4 is also hollow structure, and the shape of the outer wall of damping body 4 matches the shape of the inner wall of shell 6, and damping liquid 8 is filled in the gap between the outer wall of damping body 4 and the inner wall of shell 6. Damping liquid 8 is also filled between plunger 2 and sealing body 3, which communicates with the damping liquid 8 between the outer wall of damping body 4 and shell 6.

[0020] When damping body 4 displaces with the pipeline, the gap between damping body 4 and shell 6 will hinder the excessive displacement of damping body 4, at the same time, damping body 4 will form extrusion and shearing action on damping liquid 8, damping liquid 8 forms a reverse damping force on damping body 4, and converts the kinetic energy of vibration into heat energy.

[0021] In a preferred embodiment, the damping body 4 is provided with a plurality of buffer holes 5 in the axial and lower portions, which are uniformly distributed in the damping body 4, so that the damping body 4 has a honeycomb-like structure, thereby increasing the damping effect of the damping body 4. The damping body 4 is hollow, and the inner cavity of the damping body 4 is filled with a plurality of damping particles 7. In this embodiment, the damping particles 7 are elastic spheres of different sizes. When the damping body 4 vibrates, the damping particles 7 inside the damping body 4 also vibrate, and the damping particles 7 collide with each other, thereby converting the kinetic energy of the damping body 4 into the kinetic energy of the damping particles 7, thereby achieving the damping effect.

[0022] The working principle of the utility model is as follows: during installation, the pipeline is connected together with the upper connecting plate 1 through the pipe clamp and the pipe support component, and when the pipeline vibrates, the damping body 4 is driven to vibrate together with the upper connecting plate 1 and the plunger 2, the damping body 4 forms extrusion and shearing action on the damping liquid 8, the damping liquid 8 forms reverse damping force on the damping body 4, and converts the kinetic energy of the 4 vibration into heat energy; the inner wall of the shell 6 is in the structure of a gourd, when the damping body 4 displaces with the pipeline, the gap between the damping body 4 and the shell 6 hinders the damping body 4 from displacing too much, thereby avoiding the pipeline from generating secondary stress, so that the pipeline is protected; meanwhile, the damping body 4 is filled with a certain amount of damping particles 7, when the damping body 4 vibrates, the damping particles 7 inside the damping body 4 also vibrate, and the damping particles 7 in the damping body 4 collide with each other, thereby converting the kinetic energy of the damping body 4 into the kinetic energy of the damping particles 7, thereby achieving the damping effect.

[0023] The preferred specific embodiments and examples of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments and examples, and various changes or equivalent replacements can be made within the knowledge range of those skilled in the art without departing from the concept of the utility model, therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the application belong to the range protected by the utility model.

Claims

1. A convenient limiting viscous damper, comprising oppositely arranged upper connecting plate (1) and lower connecting plate (9), the lower part of the upper connecting plate (1) is fixedly connected with a plunger (2), characterized in that: The lower connecting plate (9) is fixedly connected with a shell (6), the upper end of the shell (6) is fixedly connected with a sealing body (3) fixedly connected with the upper connecting plate (1), the lower end of the plunger (2) is fixedly connected with a damping body (4), the damping body (4) is axially and downwardly provided with a plurality of buffer holes (5), and the damping body (4) is provided with damping liquid (8) between the damping body (4) and the shell (6).

2. The conveniently limited viscous damper according to claim 1, wherein: The inner wall of the shell (6) is in the structure of a gourd, the outer wall of the damping body (4) is matched with the shape of the inner wall of the shell (6), and the damping liquid (8) is filled between the outer wall of the damping body (4) and the inner wall of the shell (6).

3. The conveniently limited viscous damper according to claim 1, wherein: The damping body (4) is in a hollow structure, and the damping body (4) is filled with a plurality of damping particles (7) in the inner cavity.

4. The conveniently limited viscous damper according to claim 3, characterized in that: The damping particles (7) are elastic spheres of different sizes.

5. The conveniently positionable viscous damper of claim 1, wherein: The damping body (4) is in a honeycomb structure.

6. The conveniently positionable viscous damper of claim 1, wherein: The plunger (2) and the sealing body (3) are filled with damping liquid (8).

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