[Crane monitoring system] 2. National standard, architecture and data solution to be tested

 

 

Content:This is a survey and research conducted before the implementation of the entire solution, including viewing the national standards, reviewing papers, viewing the same domestic research fields and mature products. In addition, it also studies the architecture and design of cranes, in this way, we can design the signal types to be detected for the overall hardware and the preliminary selection and positioning of the hardware ~

Related file description: [download link]

>_<"GB folder:

1. GB 6067.1-2010.doc: the national standard of the People's Republic of China, which is very detailed.

2. GBT 28264-2012 safety monitoring and management system for cranes: the national standard of the crane monitoring system. It is clear and important to take notes. There are provisions on the data to be tested.

3. Handout: safety regulations for cranes part 1: General Provisions handout, crane safety related

>_<"Good:

1. GBT 14405-2011 General bridge type rolling stock: national standard

2、machine safety monitoring system description: a detailed description of a good crane safety monitoring system, very good

3rd bridge type crane main structure. PPT: very good introduction to the structure of bridge crane

>_<"Row:

110000tz-cmstoo heavy duty truck safety monitoring system .ppt: Crane cluster monitoring system, more detailed, focuses on cluster management

2. Installation of tension sensors. Doc: tension sensor installation diagram and introduction

>_<"Bad:

1、" .ppt: Crane cluster monitoring system, more detailed

2100005010t_ 28m_double-beam-bridge type structural design formal description. Doc: a person's graduation design, about the design of the crane structure, the calculation is more

>_<"Notes:

1100003-28-detailed framework .ppt: no need to read

2、STC89C51.pdf: 89C51 type single-chip microcomputer details, better

3366sensor-data-detection point .xls: monitoring content, sensor selection, similar product links, monitoring subdivision, single chip microcomputer and Display Information Summary

4、 .doc: Take a note of the PPT summary of the structure of the bridge-type middleware. The following is a detailed introduction.

 

 

Structure notes:

Directory:

I. Structure of bridge cranes

II. Structure of the cable tray

III. Running mechanism and transmission principle of the vehicle

IV. Vehicle operating mechanism and transmission principle

V. Lifting mechanism and transmission principle

VI. Driver room

 

Overall composition:

1,Metal Structure

: Cable tray

: Main girder, end girder, walking platform, guardrail and control room

: Small frame

: Frame and railing

2,The mechanical drive part is set to meet different motion requirements of the crane.

: Hoisting mechanism

: Vehicle running organization

: Vehicle running organization

3,Electrical part

: Electrical Line

: Electrical equipment

 

Cable tray

Function:The crane bridge is a kind of mobile metal structure. It bears the quality of the truck and is supported on the track by the wheel. Therefore, it is the main bearing component of the crane.

 

Composition:It is composed of the main girder (long), the end girder (short), the trolley track, and the walking guardrail.

Steel frame structure:It has a box structure and a truss structure. In addition, there are circular and steel shapes. -Box beam is the most widely used.

Differences between the box girder and the truss girder:

(1) under the same conditions, the truss structure is higher than that of the box girder, but the knots are prone to stress concentration or even cracks;

(2) the box structure is relatively heavy;

(3) convenient manufacturing of box structures;

(4) the box structure can use an angular bearing box, and there is a stress concentration in the connection with the end girder, which is prone to cracks.

Hidden danger structure:

1) there is a stress concentration at the bearing frame of the end girder connection angle of the bridge crane, and cracks may occur at the site.

2) the main and end beam connection parts of the bridge crane are relatively strong and are prone to cracks.

3) for a crane with a truss structure, the node plate is a part with many cracks.

Technical requirements:

(1) after the test run, when the no-load vehicle is located at the cross-end, the main girder should have a uniform arch, and its arch is not less than 1/1000 of the bridge crane span;

(2) when the vehicle stops at the center of the bridge to lift the rated load, the elastic deflection value generated by the main girder should not exceed 1/700 of the span (calculated from the actual arch value): the deflection is 1/500, and the resistance is increased by 40%.

(3) when the static load test is performed for 25% of the rated load, permanent deformation of the cable tray is not allowed.

 

 

Structure of the box girder:

 

: The main girder will be disturbed.[Detailed detection and repair methods are provided in that PPT]

 

Vehicle operating mechanism and transmission principle

 

: The rotation form of the vehicle running mechanism [centralized and separately driven]

 

 

Trolley

: It mainly includes a small frame, a trolley running mechanism and a lifting mechanism.

 

Composition:

1) the vehicle operating mechanism includes driving, transmission, bearing and braking devices.

2) the four wheels of a vehicle (half of which are active wheels) are fixed at the four corners of the frame. The wheels are generally grouped parts with an angular bearing box.

3) the motor of the operating mechanism is installed on the table of the small frame. Because the motor shaft and the axle are not in the same horizontal plane, the vertical three-level cylindrical gear reductor is used.

4) between the motor shaft and the axle, use a full gear coupling or a half gear coupling with a floating shaft to compensate for the deformation of the small frame and the installation error.

: The crane car is divided into single-girder and double-girder, with a small frame, lifting mechanism, car driving mechanism composition.   In addition, there are protective devices such as buffers and guardrails on the car. The frame is divided into casting and welding structures. Generally, the welding structure is used.  

 

Driving principle of the car ::

 

: The motor of the vehicle running mechanism is installed on the table of the small frame. Because the motor shaft and the axle are not in the same horizontal plane, the vertical three-level cylindrical gear reductor is used. : Consists of motors, brakes, coupling, reducers, wheels, transmission shafts, etc.

The driving principle is:Motor-gear coupling-reduction gear-coupling-drive shaft-wheel

 

 

Hoisting mechanism

Composition of the hoisting mechanism ::

: The lifting mechanism is mainly composed of the driving device, transmission device, winding device, take device and brake device. In addition, you can also install various auxiliary devices as needed, such as a limiter and a weight limiter. The lifting mechanism can be divided into single-hook lifting mechanism and double-hook lifting mechanism.

 

Transmission principle ::

When the motor is powered on, the electromagnetic torque is generated. The coupling and transmission shaft are input to the high-speed shaft of the gearbox, and the gear transmission of the gearbox is slowed down to drive the reel to rotate with a fixed axis, so that the wire rope with a device is wound in or out of it, so that the hanging object can be raised or decreased. In order to ensure that the hanging objects can be stuck in any space without slipping hooks, a brake wheel and brake are installed at the end of the input shaft of the reductor. Two brakes are installed in the M6, M7, and M9-level hoisting mechanism.

 

 

Control Room

: It is the crane warehouse. Control system, protection device, control box and electrical protection device for large vehicles and lifting mechanism.

 

 

[Crane monitoring system] 2. National standard, architecture and data solution to be tested