在電纜橋架安裝中應用激光投線定位法

      在電纜橋架安裝中應用激光投線定位法

      電氣安裝工程中，電纜橋架的安裝進度對整個工程影響最大。激光投線儀是一種新型的光機電一體化儀器，它采用波長為635nm的半導體激光器，激光線清晰明亮，適合于較遠距離的投線定位，發(fā)射器采用專用供電電源，具有強抗干擾性、高穩(wěn)定性、抑制浪涌電流等特點，特別適于惡劣的工作環(huán)境，能有效保證鐳射激光頭的穩(wěn)定性和使用壽命。

      激光投線儀具有重力感應功能，通過氣泡調(diào)節(jié)自身水平后可以方便的投射出多條投射線，投射線在室內(nèi)50米范圍清晰可見，對線時，慢慢轉(zhuǎn)動投射轉(zhuǎn)盤，待投射線由遠到近剛好到達立柱或托臂邊緣時，擰死鎖定旋鈕，將投射轉(zhuǎn)盤固定。采用激光對線法可以節(jié)省人工作業(yè)的彈線和掛吊錘等步驟，減少掛吊錘和反復測量的時間。使用激光投線定位取代人工測量定位后，橋架安裝改進工藝流程為：激光投線定位→膨脹螺栓安裝→立柱、托臂安裝→電纜橋架安裝→電纜橋架接地。用激光投線儀定位托臂的位置，首先根據(jù)圖紙確定各層托臂的標高，先找準并固定好每層首尾兩端的托臂（包括中間轉(zhuǎn)彎處）。水平投射線在室內(nèi)50米范圍清晰可見，可以作為定位線由遠到近安裝托臂，節(jié)省每條立柱劃托臂定位線這一步驟。用激光投線儀逐一確定每條托臂的標高，保證橋架的連接板中心線在同一直線上。具體實施步驟為：

（1）在其中一條立柱上測量電纜橋架托臂的定位線，調(diào)節(jié)#2激光投線儀的水平投射線高度，使投射的水平線與該定位線高度一致。

（2）托臂對準水平投射線臨時點焊固定，用鐵錘輕敲電纜橋架托臂細調(diào)其位置，使托臂與水平投射線完全重合，再用水平尺檢查其水平。全部的電纜橋架托臂均確定到達水平位置后，再用電焊固定。

The laser projection method is used in cable bridge mounting.

In electrical installation engineering, the installation progress of cable bridge is the most important to the whole project.

The laser projector is a new type of optical and electromechanical integrated instrument. It adopts a semiconductor laser with a wavelength of 635nm. The laser line is clear and bright. It is suitable for the positioning of the casting line at a long distance.

The transmitter adopts the special power supply, which has the characteristics of strong anti-interference, high stability, and restrains the surge current, especially suitable for the bad working environment, which can effectively guarantee the stability of laser head of laser.

Sex and service life.

The laser projection instrument has the function of gravity induction, which can be easily projected by the air bubble to adjust its own level. It can be clearly visible within 50 meters of the room.

Slowly rotate the projection wheel, and when the beam is from the distance to the upright post or to the edge of the bracket, twist the locking knob to fix the projection wheel. Laser alignment can save labor.

To reduce the time of hanging hammer and repeated measurement. After replacing the manual measurement positioning with the laser projection line positioning, the improvement process of the bridge erection is as follows:

Laser projection positioning - expansion bolt installation - column, bracket installation - cable bridge mounting - cable bridge grounding.

The position of the supporting arm is positioned with the laser pointer. First, the elevation of each layer is determined according to the drawing, and the supporting arm at both ends of each floor (including the center corner) is first identified and fixed. Horizontal projection

It is clearly visible within 50 meters of the room, which can be used as the positioning line to install the bracket from far to near, saving the step of the positioning line of each column. Use the laser pointer to determine the elevation of each arm.

To ensure that the center line of the connecting plate of the bridge is on the same line. The specific implementation steps are:

(1) measure the positioning line of the cable bridge bracket on one of the columns, and adjust the horizontal projection height of the #2 laser projector, so that the horizontal line of the projection is in line with the positioning line.

(2) the alignment of the bracket arm horizontal cast rays temporary fixed spot welding, tapping cable bridge arm hammer fine tuning its position, make the bracket and horizontal rays coincide, reoccupy level check its level.

All cable bridge bracket arm is determined to reach the horizontal position, then fixed with electric welding.