CN110925514A

CN110925514A - Device for avoiding piping system acoustic resonance

Info

Publication number: CN110925514A
Application number: CN201911328696.XA
Authority: CN
Inventors: 武心壮; 况会英; 邹建荣; 胡波; 夏栓; 邱健; 施伟; 张翔云
Original assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Current assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-03-27
Anticipated expiration: 2039-12-20
Also published as: CN110925514B

Abstract

The invention discloses a device for avoiding piping system acoustic resonance, which comprises a vibration sensor, acquisition processing control equipment and heating equipment, wherein the vibration sensor is fixedly arranged on the surface of a main pipeline, the heating equipment is arranged on a branch pipeline, the vibration sensor is electrically connected with the acquisition processing control equipment, and the acquisition processing control equipment is electrically connected with the heating equipment. In the invention, the vibration sensor is configured on the main pipeline, the vibration sensor is used for monitoring a vibration signal of vibration amplification of fluid at a tee joint of the main pipeline due to the fact that vortex shedding frequency is coupled with a branch pipe acoustic frequency, and the fluid temperature of the branch pipe is controlled through the heat-removing equipment to change the acoustic frequency, so that acoustic resonance is avoided; the device starts from the mechanism of acoustic resonance coupling, and changes the temperature to decouple the vortex shedding frequency in the main pipeline from the branch pipe audio frequency, thereby eliminating the overlarge stress or fatigue of the pipeline caused by acoustic resonance and improving the safety of the piping system.

Description

Device for avoiding piping system acoustic resonance

Technical Field

The invention relates to the technical field of pipeline resonance elimination, in particular to a device for avoiding piping system acoustic resonance.

Background

In the occasions of electric power, chemical industry, military industry and the like, the phenomenon of fluid piping vibration is widely existed, and the vibration is related to a piping structure, a fluid working condition and an operation mode. Some of the vibrations may be considered at the design stage, but some cannot be completely solved at the design stage due to variations in manufacturing, mounting, and the like. There are many means for eliminating the vibration, but the method for solving the vibration problem is limited due to space and other factors. The acoustic resonance is a resonance phenomenon generated by coupling fluid-excited vibration with acoustic frequency, and is mostly generated in a main pipeline with branch pipes, and can be avoided by changing the size and the length of the branch pipes, but the modification of the branch pipes is not easy due to the limitation of tee joint manufacturing or arrangement space. Therefore, the vibration excited by the fluid and the acoustic frequency of the branch pipe can be decoupled by designing a scheme without changing the size and the arrangement trend of the branch pipe, and the vibration of the pipeline is reduced. The invention aims to provide a device for avoiding piping acoustic resonance, which is characterized in that a vibration sensor is arranged on a main pipeline, vibration signals of fluid subjected to vibration amplification after vortex shedding frequency is coupled with branch pipe audio frequency at a tee joint of the main pipeline are monitored through the vibration sensor, and the acoustic frequency is changed by controlling the fluid temperature of the branch pipe, so that the acoustic resonance is avoided. The signal of the vibration sensor is sent to the acquisition processing control device, the vibration frequency is obtained after processing, the target temperature of the fluid in the branch pipe is obtained after the vibration frequency is compared with the branch pipe audio frequency, and the acoustic resonance is avoided by heating the branch pipe fluid to change the audio frequency. The branch pipe is provided with a pipeline heater and a temperature sensor which are used for heating the fluid in the pipeline and monitoring the temperature of the fluid in the pipeline. The control of the pipeline heater is realized through a heating controller and a heating loop. The design starts from the mechanism of acoustic resonance coupling, and adopts the temperature change to decouple the vortex shedding frequency in the main pipeline and the branch pipe audio frequency, thereby realizing the purpose of avoiding piping acoustic resonance, eliminating the overlarge stress or fatigue of the pipeline caused by the acoustic resonance and improving the safety of the piping.

Disclosure of Invention

The invention aims to solve the problem that the resonance of a pipeline is difficult to eliminate by changing the size and the length of a branch pipe due to the limitation of the manufacturing or arrangement space of a tee joint, and provides a device for avoiding the acoustic resonance of a pipeline.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an avoid piping acoustic resonance's device, includes vibration sensor, collection processing controlgear, firing equipment, vibration sensor fixed mounting is on the surface of trunk line, firing equipment installs at the pipeline, be the electricity between vibration sensor and the collection processing controlgear and be connected, be the electricity between collection processing controlgear and the firing equipment and be connected.

The design is provided with a vibration sensor on the main pipeline, the vibration sensor monitors vibration signals of fluid amplified by vibration after vortex shedding frequency and branch pipe audio frequency coupling at a tee joint of the main pipeline, and the fluid temperature of the branch pipe is controlled by heating equipment to change the acoustic frequency, so that acoustic resonance is avoided. Starting from the mechanism of acoustic resonance coupling, the vortex shedding frequency in the main pipeline and the branch pipe audio frequency are decoupled by changing the temperature, so that the purpose of avoiding piping acoustic resonance is realized, overlarge stress or fatigue of the pipeline caused by the acoustic resonance is eliminated, and the safety of the piping is improved.

Preferably, the heating device comprises a heater and a heating controller, the heater and the heating controller are connected through the same loop, and the heater is fixedly installed inside the branch pipe; the control of the pipeline heater is realized through the heating controller and the heating loop, and the heating effect is realized.

Preferably, the heating device further comprises a temperature sensor, and the temperature sensor is electrically connected with the heating controller; the temperature control device is used for monitoring the temperature of fluid in the pipeline, so that the temperature control is more accurate.

Compared with the prior art, the invention has the beneficial effects that:

1. through having configured vibration sensor on the trunk line, through vibration sensor monitoring fluid through trunk line tee bend department because the vortex shedding frequency with the branch pipe acoustic frequency coupling after the vibration signal of vibration amplification to fluid temperature through the equipment control branch pipe of giving up heat changes acoustic frequency, thereby avoids acoustic resonance's emergence.

2. The device starts from the mechanism of acoustic resonance coupling, adopts the temperature change to decouple the vortex shedding frequency in the main pipeline and the branch pipe audio frequency, realizes the purpose of avoiding piping acoustic resonance, eliminates the overlarge stress or fatigue of the pipeline caused by the acoustic resonance, and improves the safety of the piping.

Drawings

Fig. 1 is a schematic view of a working flow structure of an apparatus for preventing acoustic resonance of a pipe system according to the present invention.

In the figure: the device comprises a main pipeline 1, a fluid 2, a tee joint 3, a branch pipeline 4, a heater 5, a vibration sensor 6, a vibration signal 7, a collecting and processing control device 8, a temperature sensor 9, a temperature signal 10, a heating controller 11, a heating loop 12 and a control signal 13.

Detailed Description

The invention provides a device for avoiding piping system acoustic resonance, which comprises a vibration sensor 6, an acquisition processing control device 8 and a heating device, wherein the heating device comprises a heater 5 and a heating controller 11, the heater 5 and the heating controller 11 are connected through the same loop, the heater 5 is fixedly arranged inside a branch pipeline 4, the vibration sensor 6 is fixedly arranged on the surface of a main pipeline 1, the heating device also comprises a temperature sensor 9, the temperature sensor 9 is electrically connected with the heating controller 11 and is fixedly arranged on the surface of the branch pipeline 4, the vibration sensor 6 is electrically connected with the acquisition processing control device 8, and the acquisition processing control device 8 is electrically connected with the heating controller 11.

For a clearer understanding of the present invention, the operation of the apparatus for avoiding acoustic resonance of piping will be described in detail below with reference to fig. 1.

The device for avoiding the piping acoustic resonance can be used for vibration occasions caused by the acoustic resonance of the fluid 2, such as industries of electric power, chemical industry, military industry and the like, and mainly comprises a vibration sensor 6, an acquisition processing control device 8, a heating controller 11, a heating loop 12, a pipeline heater 5, a temperature sensor 9 and the like. During the operation of system's intensification gradually, when fluid 2 in the main pipeline 1 flowed through tee bend 3 on the main pipeline 1, produced the swirl phenomenon of droing, the swirl drops and has certain frequency, and this frequency will produce acoustic resonance if the audio frequency is the same or is close with in the small transfer line 4, can aggravate the vibration of pipeline, if the structural frequency of acoustic resonance frequency again with the piping is the same can be close, can further aggravate the vibration of pipeline. Vibration of the main pipeline 1 is monitored through the vibration sensor 6, the vibration signal 7 is sent to the acquisition processing control device 8, the frequency of pipeline vibration is obtained through processing, if the frequency is the same as or close to the audio frequency of the branch pipeline 4, the target temperature of the fluid 2 in the branch pipeline 4 is obtained through calculation, the acquisition processing control device 8 sends a control signal 13, the pipeline heater 5 is started through the heating controller 11 and the heating loop 12, the fluid 2 in the branch pipeline 4 is heated, the temperature of the fluid 2 in the branch pipeline 4 is monitored through the temperature sensor 9, the temperature signal 10 is sent to the acquisition processing control device 8, and when the temperature of the fluid 2 in the branch pipeline 4 reaches the target temperature, the pipeline heater 5 is closed through the heating controller 11. At the moment, the temperature of the fluid 2 in the branch pipeline 4 changes, and the acoustic frequency is changed, so that the frequency of vortex shedding is decoupled from the acoustic frequency, and acoustic resonance is avoided.

The vibration sensor 6 is configured on the main pipeline 1 in the process, the vibration sensor 6 is used for monitoring a vibration signal 7 of the fluid 2 which is subjected to vibration amplification after vortex shedding frequency and the acoustic frequency coupling of the branch pipeline 4 are carried out at the tee joint 3 of the main pipeline 1, and the acoustic frequency is changed by controlling the temperature of the fluid 2 of the branch pipeline 4, so that the acoustic resonance is avoided. The signal of the vibration sensor 6 is sent to the acquisition processing control device 8, the vibration frequency is obtained after processing, the target temperature of the fluid 2 in the branch pipe 4 is obtained after the acoustic frequency is compared with the acoustic frequency of the branch pipe 4, and the fluid 2 is used for changing the acoustic frequency by heating the branch pipe 4, so that the acoustic resonance is avoided. The branch pipe 4 is provided with a pipe heater 5 and a temperature sensor 9 for heating the fluid 2 in the pipe and monitoring the temperature of the fluid 2 in the pipe. The control of the pipe heater 5 is achieved by a heating controller 11 and a heating circuit 12. The design starts from the mechanism of acoustic resonance coupling, and adopts the mode of changing the temperature to decouple the vortex shedding frequency in the main pipeline 1 and the audio frequency of the branch pipeline 4, thereby realizing the purpose of avoiding piping system acoustic resonance, eliminating the overlarge stress or fatigue of the pipeline caused by the acoustic resonance and improving the safety of the piping system.

The connection of the aforementioned components is only illustrative and not restrictive, and other connection methods are also possible.

Claims

1. The utility model provides an avoid piping acoustic resonance's device, includes vibration sensor (6), collection processing controlgear (8), firing equipment, its characterized in that, vibration sensor (6) fixed mounting is on the surface of trunk line (1), firing equipment installs on branch pipeline (4), be the electricity between vibration sensor (6) and the collection processing controlgear (8) and be connected, be the electricity between collection processing controlgear (8) and the firing equipment.

2. A device for avoiding acoustic resonance of tubing as claimed in claim 1, wherein said heating means comprises a heater (5) and a heating controller (11), said heater (5) and heating controller (11) being connected by the same heating circuit (12), said heater (5) being fixedly mounted inside the branch conduit (4).

3. A device for avoiding acoustic resonance in pipe system as claimed in claim 2, wherein said heating apparatus further comprises a temperature sensor (9), said temperature sensor (9) and said heating controller (11) are electrically connected and fixedly mounted on the surface of the branch pipe (4).