CN110925514B - Device for avoiding piping system acoustic resonance - Google Patents

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 pipeline 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. Based on 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 achieved, 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 amain pipeline 1, afluid 2, atee joint 3, abranch pipeline 4, aheater 5, avibration sensor 6, avibration signal 7, a collecting andprocessing control device 8, atemperature sensor 9, atemperature signal 10, aheating controller 11, aheating loop 12 and acontrol signal 13.

Detailed Description

The invention provides a device for avoiding piping system acoustic resonance, which comprises avibration sensor 6, an acquisitionprocessing control device 8 and a heating device, wherein the heating device comprises aheater 5 and aheating controller 11, theheater 5 and theheating controller 11 are connected through the same loop, theheater 5 is fixedly arranged inside abranch pipeline 4, thevibration sensor 6 is fixedly arranged on the surface of amain pipeline 1, the heating device also comprises atemperature sensor 9, thetemperature sensor 9 is electrically connected with theheating controller 11 and is fixedly arranged on the surface of thebranch pipeline 4, thevibration sensor 6 is electrically connected with the acquisitionprocessing control device 8, and the acquisitionprocessing control device 8 is electrically connected with theheating 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 thefluid 2, such as industries of electric power, chemical industry, military industry and the like, and mainly comprises avibration sensor 6, an acquisitionprocessing control device 8, aheating controller 11, aheating loop 12, apipeline heater 5, atemperature sensor 9 and the like. During the operation of system's intensification gradually, whenfluid 2 in themain pipeline 1 flowed throughtee bend 3 on themain 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 thesmall 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 themain pipeline 1 is monitored through thevibration sensor 6, thevibration signal 7 is sent to the acquisitionprocessing 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 thebranch pipeline 4, the target temperature of thefluid 2 in thebranch pipeline 4 is obtained through calculation, the acquisitionprocessing control device 8 sends acontrol signal 13, thepipeline heater 5 is started through theheating controller 11 and theheating loop 12, thefluid 2 in thebranch pipeline 4 is heated, the temperature of thefluid 2 in thebranch pipeline 4 is monitored through thetemperature sensor 9, thetemperature signal 10 is sent to the acquisitionprocessing control device 8, and when the temperature of thefluid 2 in thebranch pipeline 4 reaches the target temperature, thepipeline heater 5 is closed through theheating controller 11. At the moment, the temperature of thefluid 2 in thebranch 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.

Thevibration sensor 6 is configured on themain pipeline 1 in the process, thevibration sensor 6 is used for monitoring avibration signal 7 of thefluid 2 which is subjected to vibration amplification after vortex shedding frequency and the acoustic frequency coupling of thebranch pipeline 4 are carried out at thetee joint 3 of themain pipeline 1, and the acoustic frequency is changed by controlling the temperature of thefluid 2 of thebranch pipeline 4, so that the acoustic resonance is avoided. The signal of thevibration sensor 6 is sent to the acquisitionprocessing control device 8, the vibration frequency is obtained after processing, the target temperature of thefluid 2 in thebranch pipe 4 is obtained after the acoustic frequency is compared with the acoustic frequency of thebranch pipe 4, and thefluid 2 is used for changing the acoustic frequency by heating thebranch pipe 4, so that the acoustic resonance is avoided. Thebranch pipe 4 is provided with apipe heater 5 and atemperature sensor 9 for heating thefluid 2 in the pipe and monitoring the temperature of thefluid 2 in the pipe. The control of thepipe heater 5 is achieved by aheating controller 11 and aheating 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 themain pipeline 1 and the audio frequency of thebranch 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)

1. The method for avoiding the acoustic resonance of the pipe system comprises a device for avoiding the acoustic resonance of the pipe system, wherein the device comprises a vibration sensor (6), a collection processing control device (8) and a heating device, and is characterized in that the vibration sensor (6) is fixedly arranged on the surface of a main pipeline (1), the vibration sensor (6) is electrically connected with the collection processing control device (8), the heating device comprises a heater (5) and a heating controller (11), the heater (5) is connected with the heating controller (11) through the same loop, and the heater (5) is fixedly arranged inside a branch pipeline (4); the heating equipment further comprises a temperature sensor (9), the temperature sensor (9) is electrically connected with the heating controller (11) and fixedly installed on the surface of the branch pipeline (4), the vibration sensor (6) is electrically connected with the acquisition processing control equipment (8), and the acquisition processing control equipment (8) is electrically connected with the heating controller (11); the vibration of the main pipeline (1) is monitored by a vibration sensor (6), a vibration signal (7) is sent to a collecting and processing control device (8) and is processed to obtain the vibration frequency of the pipeline, if the frequency is the same as or close to the acoustic 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 out a control signal (13), the pipe heater (5) is turned on by the heating controller (11) and the heating loop (12), heating the fluid (2) in the branch pipeline (4), monitoring the temperature of the fluid (2) in the branch pipeline (4) by using a temperature sensor (9), sending a temperature signal (10) to an acquisition processing control device (8), when the temperature of the fluid (2) in the branch pipeline (4) reaches the target temperature, the pipeline heater (5) is turned off through the heating controller (11); the three-way pipe (3) of the main pipeline (1) is monitored through the vibration sensor (6), vibration signals (7) which are amplified due to vibration after vortex shedding frequency is coupled with the audio frequency of the branch pipeline (4) are detected, and the acoustic frequency is changed by controlling the temperature of the fluid (2) of the branch pipeline (4), so that acoustic resonance is avoided.

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