Selection of safety monitoring device for pipe crane - 交通路桥类crane computer, safe load indicator,Marine CCTV Camera System

Selection of safety monitoring device for pipe crane

Time:2015-07-08 04:09 Read:11918 Source:Internet

Moment limiter of pipe hanger

Moment limiter of pipe hanger
Installation diagram of moment limiter of pipe hanger

IMoment limiter of pipe hangersummary:
When the pipe crane is working, it is necessary to frequently change the working conditions according to the actual situation on the site, such as changing the lifting angle (amplitude), lifting arm length, etc. while the maximum rated lifting capacity and the maximum and minimum working amplitude that can be lifted under different working conditions are different. Therefore, a set of devices is required to comprehensively monitor and judge the above parameters, and make a judgment on the normal operation, full load, overload, amplitude exceeding the upper limit Indication of working conditions such as amplitude exceeding the lower limit, and corresponding alarm, prompt and control to ensure normal operation of hoisting machinery.
Torque limiter is a safety protection device applied to lifting machinery according to the above requirements. On the basis of summarizing the experience of torque limiter at home and abroad, our company has developed and produced WTL series torque limiter products by applying new technologies and new devices. The main components of torque limiter are display instrument (including processor), signal
No. box, angle meter or angle length meter (mainly truck crane with changeable boom), weight limiter, wind speed sensor, wind direction sensor, etc.


IIMoment limiter of pipe hangerto configure

to configure

quantity

model

explain

Host instrument

1

Wtl-a (100) (recommended)

Display angle, rated weight, load rate, etc. Anti jitter delay function

Goniometer

1

JD-180

Waterproof conductive plastic potentiometer is adopted


Weight sensor
(choose one)


1

Side pressure sensor (py)

Measure the tension of steel wire rope

Plate ring pull sensor (BH-2)

Measure the tension of steel wire rope


III Moment limiter of pipe hangerConfiguration description
(1) Torque limiter host instrument
Pipe hanger Torque limiterRecommended instrument model: wtl-a (100)
Signal monitoring: one way of weight signal and one way of angle signal monitoring
Screen display: double window LED display
Signal output: output relay signal or RS485 signal and 4-20mA
Power supply mode: AC 220V ± 15%, 380V ± 15%, DC 24V ± 15%
Installation method: wall mounted

Wtl-a (100) torque limiter instrument wtl-a (100) torque limiter instrument is installed in Mawan port, Shenzhen
Moment limiter of pipe hangerOther optional instrument models: wtl-a (200), wtl-a300, wtl-a400, wtl-a500

Wtl-a200 torque limiter instrument wtl-a300 torque limiter instrument wtl-a400 torque limiter instrument wtl-a500 torque limiter instrument


(2) Goniometer
Moment limiter of pipe hangerAvailable goniometer models: jd-180 and jd-c90
Moment limiter of pipe hangerRecommended model of goniometer: jd-180
Installation position: root of boom of pipe crane
Installation instructions: the horizontal line of the goniometer is parallel to the arm


Outline dimensions of jd-180 angle meter


Jd-180 angle meter jd-180 angle meter is installed in Jilin electric key

(3) Weight sensor
a. Py type side pressure sensor
Installation position: fixed end of wire rope
Power take-off mode: wire rope tension
Installation requirements: the lifting rope of the pipe crane must have a fixed end


Outline dimension drawing of Py type side pressure sensor



Py type side pressure sensor installation method of Py type side pressure sensor

b. BH-2 type plate ring pull sensor
Installation position: it is installed at the connection between the fixed rope (fixed rope) of the lifting rope and the boom.
Power taking method: measure the tension of the lifting rope.
Precautions: ① the lifting rope must have a fixed rope (fixed rope)
② There is no fixed pulley at the connection between the fixed rope and the boom
Range selection: maximum rated lifting capacity ÷ wire rope magnification = sensor range


Outline dimension drawing of BH-2 plate ring pull sensor


BH-2 plate ring pull sensor BH plate ring pull sensor is installed in Huaneng International Fuzhou power plant

4、 Control principle of torque limiter
There are three conventional controls of torque limiter in our company: amplitude upper limit control, amplitude lower limit control and overload control, which are described as follows:
1. Amplitude upper limit control: when the boom operates to the minimum amplitude (maximum angle), the instrument will give an audible and visual alarm, the amplitude upper limit relay will act, cut off the amplitude reduction circuit, and make the boom stop amplitude reduction, but it can move in the safe direction (amplitude increase)
2. Amplitude lower limit control: when the boom operates to the maximum amplitude (minimum angle), the instrument will send an audible and visual alarm, the amplitude upper limit relay will act, cut off the amplitude bribe, and make the boom stop increasing, but it can move in the safe direction (amplitude reduction)
3. Overload control: when the actual lifting capacity reaches 95% of the rated lifting capacity, the instrument will send out a full load audible and visual alarm, but not control. When the actual lifting capacity reaches 105% of the rated capacity, the instrument will send out an overload audible and visual alarm, the overload relay will act, cut off the fishing lifting circuit and boom amplitude increasing circuit, so that the crane can move in a safe direction (reduce the number of pairs or drop the hook)

5、 Precautions for ordering torque limiter
1. Specific model (wtl-a100, digital tube; wtl-a200, black and white screen or blue screen; wtl-a300, color screen machine, see product selection manual for details)
2. Several ways of weight (whether it is the main and auxiliary hook or the grab / hook)
3. Line length of goniometer;
4. Load curve table, arm length, magnification and center distance;
5. Sensor model, size and cable length;
6. Whether the weight sensor (pull type sensor) needs supporting guard plate;
7. Wire rope diameter;
8. Output control: normal control: upper limit, lower limit and overload; If there are other special requirements, special remarks are required;
9. Power type (24V, 220V, 380V)