CN103335705B

CN103335705B - A kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor

Info

Publication number: CN103335705B
Application number: CN201310272746.3A
Authority: CN
Inventors: 童杏林; 赵敏利; 钟东; 蔡婷; 王坤
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2013-07-02
Filing date: 2013-07-02
Publication date: 2016-06-22
Anticipated expiration: 2033-07-02
Also published as: CN103335705A

Abstract

The fiber F-P acoustic sensor of a kind of coking tower hydraulic decoking condition monitoring, this sensor is mainly made up of poly-cylinder record, steel pipe, condenser, sensitive sheet, optics F-P resonant cavity, fixed pedestal and optical cable output protection joint；Poly-cylinder record front end is that arcuation horn mouth is easy to contact closely knit with coke drum walls；Condenser is made up of condensation chamber and intake-outlet, is greatly reduced the temperature being delivered to optics F-P resonant cavity by poly-cylinder record wall by recirculated water cooling by recirculated water cooling；Fixed pedestal is used for fixing sensor；Sound wave produced by hydraulic decoking process mesohigh water slug tower wall is delivered to the sensitive diaphragm of optics F-P resonant cavity by poly-cylinder record, and the optical signalling reflected by changing optics F-P resonant cavity measures the state of the knots modification acquisition hydraulic decoking of this signal。This sensor construction is simple, easy to use。

Description

A kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor

Technical field

The present invention relates to a kind of petrochemical industry coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor, belong to field of sensing technologies。

Background technology

At present, domestic device generally relies on the coke water in going out bottom the continuous observing tower of operator in chute in hydraulic decoking process, judges whether the coke in coke drum is cut totally according to working experience。By the impact of the factors such as operating condition, weather, especially cut Jiao night, operator cannot accurate observation and judgement, the most at last impact cut Jiao carrying out。It is little that fiber F-P acoustic sensor has size, light weight, electromagnetism interference, the explosion-proof advantage waiting piezoelectric transducer not possess of intrinsic。In recent years, fiber F-P acoustic sensor is widely used in the engineering field of many bad environments, and plays the effect wanted emphatically。In the coking tower hydraulic decoking condition monitoring system of petrochemical industry, what use at present is that piezoelectric transducer carries out vibration signal data acquisition。Such as, what use in the hydraulic decoking Monitoring System that Wang Tao et al. (indicating reference document title) proposes is exactly CA-YD-185TNC type piezoelectric acceleration transducer。During data acquisition, what sensor received is typically all more weak low level signal, signal need to be amplified, and to convert electrical signals to digital signal, and it is less convenient to deal with。Chinese Patent Application No. is " the hydraulic coke-cutting coke automatic checkout system " of 201110091022.x, and the vibrating sensor in system is ICP type piezoelectric acceleration sensor, and it is connected the realization real-time analysis to signal by holding wire with dynamic signal analyzer device。But both the above piezoelectric transducer is in the environment of coking tower is highly susceptible to temperature, the impact of the factors such as electromagnetic field。

Summary of the invention

The purpose of the present invention aims to solve the problem that the acoustic signal that the monitoring system against high voltage water nozzle impact coking tower wall of coking tower hydraulic decoking produces is picked up, a kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor is provided, judges coking tower hydraulic decoking situation with this sensor。This sensor intrinsic is explosion-proof, and electromagnetism interference, it is easy to multiplexing uses safer, more convenient。

Present invention employs following technical scheme:

A kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor, this sensor includes poly-cylinder record, fixed pedestal, condenser, optics F-P resonant cavity, optical cable output protection joint and steel pipe；Described poly-cylinder record front end is that arcuation horn mouth matches with coke drum walls radian, and poly-cylinder record rear end is integral with steel pipe；Condenser is made up of condensation chamber and intake-outlet, is wrapped in outer surface of steel tube；Optics F-P resonant cavity is assemblied in steel pipe；Steel pipe end and bonnet link together；Sensor tail optical fiber is drawn by the optical cable output protection joint being fixed on bonnet outer end, and described fixed pedestal is fixed on outside coking tower tower wall, and fixed pedestal fixes sensor, makes horn mouth and the close contact of coke drum tower wall of poly-cylinder record。

Wherein, described poly-cylinder record is processed arcuation horn mouth by the mouth of pipe of steel pipe according to the radian of tower wall and is constituted。

The horn mouth diameter of described poly-cylinder record is between 110mm-150mm。

Described fixed pedestal is positioned at the horn mouth 30-50mm place from poly-cylinder record。

Described optics F-P resonant cavity is contained in steel pipe, is positioned at the 100-200mm place, rear of condenser position。

Described steel pipe end is threadeded with bonnet。

Bottom described bonnet porose, optical cable output protection joint is arranged on bonnet base apertures outer end。

The coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor of the present invention, is fixed on coking tower tower wall with fixed pedestal；Poly-cylinder record front end is arcuation horn mouth and closely knit with coke drum walls contacts；Condenser greatly reduces the temperature being delivered to optics F-P resonant cavity by poly-cylinder record wall by recirculated water cooling；Sound wave produced by hydraulic decoking process mesohigh water slug tower wall is delivered to the sensitive diaphragm of optics F-P resonant cavity by poly-cylinder record, and the optical signalling reflected by changing optics F-P resonant cavity measures the state of the knots modification acquisition hydraulic decoking of this signal。

The present invention has following technological merit:

1. this fiber F-P acoustic sensor simple in construction, it is easy to multiplexing, easy to use。

2. arcuation horn mouth is closely knit with coke drum walls contacts, it is simple to accurately detect sound wave。

3. the recirculated water cooling of condenser eliminates the impact on sensor of the coke drum walls temperature。

4. just can obtain the state of hydraulic decoking by measuring the optical signalling knots modification of optics F-P resonant cavity, operate convenient。

5. it is monitored coking tower hydraulic decoking situation with fiber F-P acoustic sensor, the interference of electromagnetic field will not be subject to, and sensor intrinsic is explosion-proof, use safer。

Accompanying drawing explanation

Accompanying drawing 1 is the overall structure of the fiber F-P acoustic sensor of coking tower hydraulic decoking condition monitoring。

In figure: 1-gathers cylinder record, 2-fixed pedestal, 3-condenser, 4-sensitivity sheet, 5-optics F-P resonant cavity, 6-bonnet, 7-optical cable output protection joint, 8-tail optical fiber, 9-steel pipe, 10-condenser water inlet, 11-leaving condenser water mouth。

Detailed description of the invention

To the fiber F-P acoustic sensor structure of the coking tower hydraulic decoking condition monitoring of the present invention below in conjunction with accompanying drawing and realize principle and be described further。

The structure of the fiber F-P acoustic sensor of the coking tower hydraulic decoking condition monitoring of the present invention is as it is shown in figure 1, this sensor is mainly made up of poly-cylinder record 1, condenser 3, fiber F-P resonator cavity 5, fixed pedestal 2 and optical cable output protection joint 7。Poly-cylinder record 1 is processed arcuation horn mouth by the mouth of pipe of steel pipe 9 according to the radian of tower wall and is constituted so that it is front end is arcuation horn mouth and closely knit with coke drum walls contacts。Condenser 3 is by condensation chamber and water inlet 10, and outlet 11 forms, and is arranged on outer surface of steel tube。The fiber F-P acoustic sensor of coking tower hydraulic decoking condition monitoring is fixed in coke drum walls by fixed pedestal 2 by rivet。It is internal that optics F-P resonant cavity 5 is assemblied in steel pipe 9, and bonnet 6 and steel pipe end thread link together, and lid bottom has hole, and optical cable output protection joint 7 is arranged on bonnet base apertures outer end, and sensor tail optical fiber 8 is drawn from optical cable output protection joint。

The principle that sensor coking tower hydraulic decoking condition monitoring realizes illustrates as follows: front end is that the bell-mouthed poly-cylinder record 1 of arcuation is closely knit with coke drum walls to be contacted, detect sound wave more accurately and will act on the sensitive diaphragm 4 of optics F-P resonant cavity, thus changing the optical signalling that optics F-P resonant cavity 5 reflects, obtain the state of hydraulic decoking by measuring the knots modification of this signal。Condenser 3 eliminates the impact on sensor of the coke drum walls temperature by recirculated water cooling。

Claims

1. a coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor; it is characterized in that, this sensor includes poly-cylinder record (1), fixed pedestal (2), condenser (3), optics F-P resonant cavity (5), optical cable output protection joint (7) and steel pipe (9)；Described poly-cylinder record front end is that arcuation horn mouth matches with coke drum walls radian, and poly-cylinder record rear end is integral with steel pipe (9)；Condenser (3) is made up of condensation chamber and intake-outlet, is wrapped in steel pipe (9) outer surface；Optics F-P resonant cavity (5) is assemblied in steel pipe (9)；Steel pipe (9) end and bonnet (6) link together；Sensor tail optical fiber (8) is drawn by optical cable output protection joint (7) being fixed on bonnet outer end, and fixed pedestal (2) is fixed on outside coking tower tower wall, and fixed pedestal (2) fixes sensor, makes horn mouth and the close contact of coke drum tower wall of poly-cylinder record；Poly-cylinder record (1) is processed arcuation horn mouth by the mouth of pipe of steel pipe (9) according to the radian of tower wall and is constituted；Optics F-P resonant cavity (5) is contained in steel pipe (9), is positioned at the 100-200mm place, rear of condenser (3) position；Steel pipe end is threadeded with bonnet (6)；Bonnet (6) bottom is porose, and optical cable output protection joint (7) is arranged on bonnet (6) base apertures outer end。

2. a kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor according to claim 1, it is characterised in that: the horn mouth diameter of poly-cylinder record (1) is between 110mm-150mm。

3. a kind of coking tower hydraulic decoking condition monitoring fiber F-P acoustic sensor according to claim 1, it is characterised in that: fixed pedestal (2) is positioned at the horn mouth 30-50mm place from poly-cylinder record。