阅读说明：本技术 一种吊装射流风机的安全诊断方法及装置 (Safety diagnosis method and device for hoisting jet fan ) 是由 刘冰 贾雄峰 吴敏军 闫树龙 王闯 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种吊装射流风机的安全诊断方法及装置,涉及通风设备工程技术领域,针对单一检测风机振动,风机低频晃动,传统技术无法检测,风机长久使用产生位移、沉降、倾斜切换传感器配合,综合成本高,人工检测难度大等问题,现提出如下方案,包括支架磁条、磁性编码传感器、信号采集器、信号分析处理模块、信息传输模块、网络连接线、就地监测管理机构、数据处理设备、预埋铁、风机和BAS管理系统。本发明结构简单新颖,降低投入成本和人力劳动成本,同时检测风机振动、风机径向、轴向振动幅度和频率,检测风机位置的变化、姿态变化,分析风机机械故障、结构松动与故障,提高风机检测的准确性,提高使用的安全性,适合进行市场推广。(The invention discloses a safety diagnosis method and a safety diagnosis device for a hoisting jet fan, relates to the technical field of ventilation equipment engineering, and aims at the problems that the vibration of a single detection fan and the low-frequency shaking of the fan cannot be detected in the traditional technology, the fan generates the matching of displacement, settlement and inclination switching sensors after being used for a long time, the comprehensive cost is high, the manual detection difficulty is high, and the like. The fan vibration detection device is simple and novel in structure, reduces input cost and labor cost, simultaneously detects fan vibration, fan radial and axial vibration amplitude and frequency, detects position change and posture change of the fan, analyzes mechanical faults, structural looseness and faults of the fan, improves fan detection accuracy, improves use safety, and is suitable for market popularization.)

1. The utility model provides a hoist and mount jet fan's safety diagnosis device, includes support (1) magnetic stripe (2), magnetic coding sensor (3), signal collector (4), signal analysis processing module (5), information transmission module (6), network connection line (7), on-the-spot monitoring management mechanism (8), data processing equipment (9), pre-buried iron (10), fan (11) and BAS management system (12), its characterized in that, the top fixed mounting of fan (11) has pre-buried iron (10), the welding has support (1) on pre-buried iron (10), the bottom one side of support (1) bonds there is magnetic stripe (2), the top fixed mounting of fan (11) has magnetic coding sensor (3).

2. The safety diagnosis device for the hoisting jet fan according to claim 1, wherein a signal collector (4), a signal analysis processing module (5) and an information transmission module (6) are installed inside the on-site monitoring and management mechanism (8), and the magnetic coding sensor (3) is electrically connected with the signal collector (4) through a wire.

3. The safety diagnosis device for the hoisting jet fan is characterized in that the information transmission module (6), the data processing equipment (9), the on-site monitoring management mechanism (8) and the BAS management system (12) are connected through a network connection line (7).

4. The safety diagnosis device for hoisting the jet fan according to claim 1, wherein the number of the supports (1) is two, the supports (1) are symmetrically arranged at the tops of two ends of the fan (11), the tops of two ends of the fan are pre-embedded in the pre-embedded iron (10), and the supports (1) are perpendicular to the axis of the top of the fan (11).

5. The safety diagnosis device for hoisting jet fans as claimed in claim 1, wherein the length of the magnetic strip (2) is greater than the normal operation limit distance of the fan (11), and the bottom of the magnetic strip (2) is flush with the bottom of the bracket (1).

6. The safety diagnosis device for the hoisting jet fan as claimed in claim 1, wherein the bottom of the magnetic coding sensor (3) is fixedly connected with a base through a screwing bolt, and the central point of the magnetic coding sensor (3) is matched with the central point of the magnetic strip (2).

7. The safety diagnosis device for the hoisting jet fan as claimed in claim 1, wherein the bracket (1) is of an L-shaped structure, the width of the magnetic strip (2) is greater than or equal to 10mm, and the distance between the magnetic coding sensor (3) and the magnetic strip (2) is 5 mm.

8. The safety diagnosis method for the hoisting jet fan according to any one of claims 1 to 7, characterized by comprising the following steps:

s1, installing the magnetic coding sensor (3) on the top of the fan (11), and adhering the magnetic strip (2) to one side of the lower end of the bracket (1) so that the middle point of the magnetic coding sensor (3) corresponds to the central point of the magnetic strip (2);

s2, monitoring the magnetic stripe (2) by the magnetic coding sensor (3), and accurately monitoring the up-down and front-back movement positions of the fan (11) by the magnetic coding sensor (3);

s3, the magnetic coding sensor (3) is connected to the local monitoring management mechanism (8) through a signal cable, and the monitored information is calculated and analyzed through the signal collector (4), the signal analysis processing module (5) and the information transmission module (6) in the local monitoring management mechanism (8);

s4, the information transmission module (6) uploads the result to the data processing device (9) through the network connection line (7), and the data processing device (9) displays the result visually.

9. The safety diagnosis method for the hoisting jet fan according to claim 8, the signal collector (4) is used for receiving the signal sent by the magnetic coding sensor (3), the signal analysis and processing module (5) is used for carrying out analysis and diagnosis processing on the received digital information and displaying the running state characteristics of the fan (11) including vibration, frequency, amplitude and displacement on site, meanwhile, the software is used for further performing frequency spectrum analysis and feature library analysis to realize diagnosis of various conventional mechanical faults, including bearing abrasion, unbalance and blade damage, analyzing low-frequency shaking caused by static settlement, inclination and air flow excitation of a fan, the information transmission module (6) is used for transmitting all information and safety diagnosis results of the detected fan (11) through the network connecting line (7) according to the analysis result of the structure.

10. The safety diagnosis method for the suspended jet fan as claimed in claim 8, wherein the in-situ monitoring management mechanism (8) accesses the BAS management system (12) and other management systems according to the field use requirement.

Technical Field

The invention relates to the technical field of ventilation equipment engineering, in particular to a safety diagnosis method and device for a hoisting jet fan.

Background

Jet fans are usually suspended on the top of a tunnel or mounted on the side walls of the tunnel, and the tunnel itself is used as an air duct, so that the fans can generate high thrust from given energy when working. A part of air in the tunnel is sucked by the fan, and is ejected out of the fan outlet at a high speed after the work of the impeller is done. Based on the impact transmission principle, the high-speed airflow transmits energy to another part of air in the tunnel to drive the air to flow backwards together, so that the air in the tunnel is pushed to one end of the outlet, and fresh air is sucked from the inlet. When the air flow speed is attenuated to a certain value, the next group of fans continue to drive the air to flow in the same way, so that the aim of removing the polluted air in the tunnel is fulfilled. The jet fan is mainly used in longitudinal ventilation systems of tunnels such as highways, railways, subways and the like, and provides all thrust; it can also be used in semi-transverse ventilation system or sensitive part in transverse ventilation system, such as tunnel inlet and outlet, to induce air flow or smoke exhaust. The hoisted jet fan is positioned right above the highway and the track in the tunnel. Jet fan often opens and stops, rotatory vibration, and in case fan trouble, slope, not hard up scheduling problem are in large quantities, wide distribution, and the fan is difficult for discovering for the maintainer, and the sensor interference of tradition installation at the fan body is big, the precision is low, the function singleness, and the manual work is patrolled and examined inefficiency, the exactness is poor, can not in time early warning, causes huge artifical burden, also has great risk. The untimely accurate early warning of fan trouble will cause under the emergency (if meet situations such as conflagration exhaust fume) unstable work even unable work, and it is itself not hard up even drop also can seriously influence the security of below people or vehicle.

The current fan state monitoring technology mainly relies on vibration sensor to vibrate the monitoring, vibration monitoring or vibration analysis are carried out through vibration sensor and the rear end collection instrument of installing at the fan body, prior art needs fan vibration back vibration sensor just can play a role, and the fan is not shaken like the low frequency under the effect of tunnel wind through external force impact under the running state, the traditional art can't detect, the fan is slow displacement after long-time accumulation fatigue in addition, subside, state detection techniques such as slope also can't discern at present, need multiple sensor cooperation or other technological supplements, the comprehensive cost is high, the artifical degree of difficulty that detects is big.

Disclosure of Invention

The invention provides a safety diagnosis method and a safety diagnosis device for a hoisting jet fan, and solves the problems that the existing fan detection technology can only detect the vibration of the fan, the fan is shaken under the action of external force impact in a non-running state, the traditional technology cannot detect the vibration, the fan cannot be identified in the states of slow displacement, settlement, inclination and the like after being used for a long time, multiple sensors are matched or other technologies are used for supplement, the comprehensive cost is high, the manual detection difficulty is high, and the like.

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

the utility model provides a hoist and mount jet fan's safety diagnosis device, includes support magnetic stripe, magnetic coding sensor, signal collector, signal analysis processing module, information transmission module, network connection line, monitors administrative mechanism, data processing equipment, pre-buried iron, fan and BAS management system on the spot, the top fixed mounting of fan has pre-buried iron, the welding has the support on the pre-buried iron, bottom one side of support bonds there is the magnetic stripe, the top fixed mounting of fan has the magnetic coding sensor.

Preferably, the in-situ monitoring management mechanism is internally provided with a signal collector, a signal analysis processing module and an information transmission module, and the magnetic coding sensor is electrically connected with the signal collector through a wire.

Preferably, the information transmission module, the data processing device, the in-situ monitoring management mechanism and the BAS management system are connected through a network connection line.

Preferably, the number of the supports is two, the supports are symmetrically arranged at the tops of the two ends of the fan, the tops of the two ends of the fan are arranged in the pre-buried manner of the pre-buried iron, and the supports are perpendicular to the axis of the top of the fan.

Preferably, the length of the magnetic strip is greater than the normal operation limit distance of the fan, and the bottom of the magnetic strip is flush with the bottom of the bracket.

Preferably, the bottom of the magnetic coding sensor is fixedly connected with a base through a screwing bolt, and the central point of the magnetic coding sensor is matched with the central point of the magnetic strip.

Preferably, the support is of an L-shaped structure, the width of the magnetic strip is more than or equal to 10mm, and the distance between the magnetic coding sensor and the magnetic strip is 5 mm.

The safety diagnosis device for the hoisting jet fan further comprises a diagnosis method, and the diagnosis method comprises the following steps:

s1, mounting the magnetic coding sensor on the top of the fan, and bonding the magnetic strip on one side of the lower end of the bracket, so that the middle point of the magnetic coding sensor corresponds to the central point of the magnetic strip;

s2, monitoring the magnetic stripe by a magnetic coding sensor, and accurately monitoring the up-down and front-back movement positions of the fan by the magnetic coding sensor;

s3, the magnetic coding sensor is connected to the local monitoring management mechanism through a signal cable, and the monitored information is calculated and analyzed through a signal collector, a signal analysis processing module and an information transmission module in the local monitoring management mechanism;

and S4, the information transmission module uploads the result to the data processing equipment through the network connecting line, and the data processing equipment displays the result visually.

Preferably, the signal collector is used for receiving signals sent by the magnetic coding sensor and digitally embodying the signals, the signal analysis processing module is used for analyzing and diagnosing the received digital information and displaying the running state characteristics of the fan on site, including vibration, frequency, amplitude and displacement, and meanwhile, the frequency spectrum analysis and the characteristic library analysis are further performed through software to realize the diagnosis of various conventional mechanical faults, including bearing abrasion, unbalance and blade damage, and analyzing low-frequency shaking caused by static settlement, inclination and airflow excitation of the fan, and the information transmission module is used for transmitting all information and safety diagnosis results of the detected fan through a network connection line according to the analysis results of the structure.

Preferably, the in-situ monitoring management mechanism accesses the BAS management system and other management systems according to field use requirements.

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

1. according to the scheme, the magnetic strip is fixed through the support, and the magnetic strip is subjected to position detection through the magnetic coding sensor, so that not only can the displacement generated by the vibration of the fan be detected, but also the displacement generated by low-frequency shaking and long-term use can be detected, the accuracy of fan detection is improved, and the detection precision is high;

2. according to the scheme, the radial and axial vibration amplitude and frequency of the fan are judged through the analysis and diagnosis of the data detected by the magnetic coding sensor through the signal collector, the signal analysis processing module and the information transmission module through the structures such as the magnetic coding sensor, the signal collector, the signal analysis processing module, the information transmission module, the network connection line, the local monitoring management mechanism, the data processing equipment, the BAS management system and the like, and the use safety of the fan is improved;

to sum up, the device simple structure is novel, detects the fan through a sensor, reduces input cost and human labor cost, not only can detect traditional fan vibration, still can detect fan radial, axial vibration amplitude and frequency, detects the change of fan position, gesture change, analysis fan mechanical failure, structure are not hard up and the trouble, improve the accuracy that the fan detected, improve the security of using, are fit for carrying out marketing.

Drawings

Fig. 1 is a fan installation schematic diagram of a safety diagnosis method and device for a hoisting jet fan according to the present invention;

fig. 2 is a schematic diagram of a diagnosis system of a safety diagnosis method and device for a hoisting jet fan, which are provided by the invention;

fig. 3 is a schematic view of a bracket of the safety diagnosis method and device for hoisting a jet fan according to the present invention;

FIG. 4 is a sensor outline diagram of a safety diagnosis method and apparatus for a hoisting jet fan according to the present invention;

fig. 5 is a fan radial vibration monitoring and spectrum analysis diagram of the safety diagnosis method and device for hoisting a jet fan according to the present invention;

FIG. 6 is a time domain diagram of axial fan vibration of a safety diagnosis method and apparatus for hoisting a jet fan according to the present invention;

fig. 7 is a fan dynamic sinking time domain acquisition analysis diagram of the safety diagnosis method and device for hoisting a jet fan, which are provided by the invention;

fig. 8 is a fan static sinking time domain signal analysis diagram of the safety diagnosis method and device for hoisting a jet fan according to the present invention.

In the figure: the system comprises a support 1, a magnetic strip 2, a magnetic coding sensor 3, a signal collector 4, a signal analysis processing module 5, an information transmission module 6, a network connecting line 7, an on-site monitoring management mechanism 8, a data processing device 9, pre-embedded iron 10, a fan 11 and a BAS 12 management system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, a safety diagnosis device for a hoisting jet fan comprises a support 1, a magnetic strip 2, a magnetic coding sensor 3, a signal collector 4, a signal analysis processing module 5, an information transmission module 6, a network connection line 7, an on-site monitoring management mechanism 8, a data processing device 9, pre-embedded iron 10, a fan 11 and a BAS management system 12, wherein the pre-embedded iron 10 is fixedly installed at the top of the fan 11, the support 1 is welded on the pre-embedded iron 10, the magnetic strip 2 is bonded on one side of the bottom of the support 1, and the magnetic coding sensor 3 is fixedly installed at the top of the fan 11.

The in-situ monitoring management mechanism 8 is internally provided with a signal collector 4, a signal analysis processing module 5 and an information transmission module 6, the magnetic coding sensors 3 are electrically connected with the signal collector 4 through a wire, the information transmission module 6, a data processing device 9, the in-situ monitoring management mechanism 8 and the BAS management system 12 are connected through a network connecting wire 7, the number of the supports 1 is two, the supports 1 are symmetrically arranged at the tops of two ends of a fan 11, the tops of two ends of the fan are embedded in embedded iron 10, the supports 1 are vertical to the top axis of the fan 11, the length of the magnetic stripe 2 is larger than the normal operation limit distance of the fan 11, the bottom of the magnetic stripe 2 is flush and aligned with the bottom of the supports 1, the bottom of the magnetic coding sensors 3 is fixedly connected with a base through screwing bolts, the center point of the magnetic coding sensors 3 is matched with the center point of the magnetic stripe 2, and the supports 1 are in an L-shaped structure, the width of the magnetic strip 2 is more than or equal to 10mm, and the distance between the magnetic coding sensor 3 and the magnetic strip 2 is 5 mm.

The safety diagnosis device for the hoisting jet fan further comprises a diagnosis method, and the diagnosis method comprises the following steps:

s1, installing the magnetic coding sensor 3 on the top of the fan 11, and bonding the magnetic strip 2 on one side of the lower end of the bracket 1, so that the middle point of the magnetic coding sensor 3 corresponds to the central point of the magnetic strip 2;

s2, monitoring the magnetic stripe 2 by the magnetic coding sensor 3, and accurately monitoring the up-down and front-back movement positions of the fan 11 by the magnetic coding sensor 3;

s3, the magnetic coding sensor 3 is connected to the local monitoring management mechanism 8 through a signal cable, and the monitored information is calculated and analyzed through the signal collector 4, the signal analysis processing module 5 and the information transmission module 6 in the local monitoring management mechanism 8;

s4, the information transmission module 6 uploads the result to the data processing device 9 through the network connection line 7, and the data processing device 9 displays the result visually.

The signal collector 4 is used for receiving signals sent by the magnetic coding sensor 3 and digitally embodying the signals, the signal analysis processing module 5 is used for analyzing and diagnosing the received digital information and displaying the running state characteristics of the fan 11 on site, including vibration, frequency, amplitude and displacement, meanwhile, the frequency spectrum analysis and the characteristic library analysis are further performed through software to realize various conventional mechanical fault diagnoses including bearing wear, unbalance and blade damage and analyzing low-frequency shaking caused by static settlement, inclination and air flow excitation of the fan, the information transmission module 6 is used for transmitting all information and safety diagnosis results of the detected fan 11 through the network connecting line 7 according to the analysis results of the structure, and the on-site monitoring management mechanism 8 is connected to the BAS management system 12 and other management systems according to the on-site use requirements.

In the embodiment, firstly, the support 1 and the embedded iron 10 are fixedly installed, the magnetic strip 2 is adhered to the bottom of one side of the support 1, the lower end of the support 1 is close to the top of the fan 11 but enough vibration space of the fan 11 is reserved, the width of the magnetic strip 2 is not less than 10mm, the length of the magnetic strip is not less than the up-and-down movement limit range of the fan 11, the magnetic coding sensor 3 is installed at the top axial line position of the fan 11, and the center of the magnetic coding sensor 3 is aligned with the center of the magnetic strip 2, the magnetic coding sensor 3 and the magnetic strip 2 are horizontally kept at a safe initial distance of 5mm, the distance can be adjusted according to the strength of magnetism, when the system works, when the fan 11 generates radial up-and-down vibration or displacement, the magnetic coding sensor 3 can output a high-frequency pulse signal, the pulse quantity is in direct proportion to the moving distance, the precision is up to 0.01mm, the pulse phase represents the moving direction, and the vibration waveform can be obtained by detecting the high-frequency pulse; when the fan 11 moves axially and horizontally, the magnetic coding sensor 3 can output another group of analog quantity signals, and the signals are in direct proportion to the magnetic field intensity, so that the axial movement distance of the fan can be obtained through the acquisition of the signals.

As shown in fig. 2, the magnetic coding sensor 3 is connected to an in-situ monitoring and managing mechanism 8 through a signal cable, the in-situ monitoring and managing mechanism 8 is integrated by a signal collector 4, a signal analyzing and processing module 5 and a signal transmission module 6, and the in-situ monitoring, analyzing and early warning managing device can perform functions of in-situ signal collection, processing, analysis, data management, communication and the like. The signal analysis processing module 5 receives the signals of the magnetic coding sensor 3, is provided with a plurality of channels which can be simultaneously accessed to a plurality of groups of fans 11 nearby, and finishes the digitization of the signals of the magnetic coding sensor 3 through the conditioning, calculation, decomposition and acquisition of an internal circuit;

as shown in fig. 5, the signal analysis processing module 5 receives the digitized information of the signal collector 4, performs analysis processing to locally display the operating state characteristics of the fan 11, such as vibration, frequency, amplitude and displacement, and simultaneously performs further frequency spectrum analysis and characteristic library analysis through software to realize various conventional mechanical fault diagnoses, such as bearing wear, unbalance, blade damage and the like, and can also analyze low-frequency shaking caused by static settlement, inclination and air flow excitation of the fan 11;

as shown in fig. 6, signal analysis shows that the axial position of the fan 11 shakes around the central line at low frequency, and the range of the average value of the signal is calculated to judge the axial activity center;

as shown in fig. 7, in the operating state of the fan 11, the fan 11 has sunk, and the operating waveform of the fan 11 has shifted downward;

as shown in fig. 8, when the fan 11 is not in operation, the fan 11 sinks, the fan 11 shakes in a low-frequency small range under the action of air flow or other external factors, and whether the sinking distance of the fan 11 is within a safe range is detected; the information transmission module 6 is provided with an information transmission and industrial general communication interface, receives the information and the analysis result of the signal analysis processing module 5, and transmits all the information and the safety diagnosis result of the monitored fan 11 to an upper-layer system through the network connection line 7.

As shown in fig. 2, the data processing device 9 may receive information from a plurality of groups of on-site monitoring and management mechanisms 8, centralize and manage the unified information, and the data processing device 9 may implement centralized display, recording, analysis, query, and management of the information of the entire system device in the system, so that the system may perform distributed centralized management of security diagnosis, and the on-site monitoring and management mechanisms 8 may also access the BAS management system 12 or other management systems to form a customized system meeting the field requirements.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.