1, pay attention to construction:
(1) The plastic pipe should not be folded or cracked, and there should be no debris in the pipe. The cutting mouth should be flat and the pipe mouth should be scraped.
(2) The connection of the plastic wire and pipe is glued, and the ends of the pipe joints should be tied tightly with the floor ribs;
(3) The plastic pipe must be firmly bonded tightly, and plastic pipe plugs should be plugged at the pipe port to prevent irrigation and plugging.
(4) A variety of switches, socket boxes, lamp terminal boxes, and pipe connections in the floor, wall, and brick structure must be connected by a connector. It is forbidden to extend the plastic pipe directly into the terminal box.
(5) Concealed junction boxes require the interior to be filled with wet cement paper or plastic foam, and no cement paper is allowed on the outside. The plastic line pipe and terminal box embedded in the floor and shear wall should be fixed firmly to prevent shifting.
2. The construction method of the Ming Pipeline is generally the piping along the wall, brackets and hangers. Before the pipe is laid, it shall be processed according to the design drawings or standard drawings, and all kinds of brackets, hangers and large steel pipes shall be pre-bent.
3, brackets, hangers generally use angle steel production.
4, measurement positioning
(1) The open piping shall be carried out after the decoration of the building is completed. Prior to piping, the position of the distribution equipment, the positions of various boxes, boxes and electrical equipment should be determined according to the design drawings, and the boxes, boxes and buildings should be firmly fixed, and then the principles of the Mingling pipeline should be horizontal and vertical, along the line. The horizontal and vertical directions are used to position the bullet line. The distance between the fixed point of the hanger and the hanger should be uniform. The distance between the tube card and the terminal, the midpoint of the turn, the edge of the electrical appliance or the junction box is 150-500 mm.
(2) The bending radius of the open pipe shall not be less than 6 times the outside diameter of the pipe, and shall not be less than the minimum allowable bending radius of the cable penetrated.
(3) When piping, pay attention to the elbow of each cable pipe should not exceed 3, and the right angle bend should not exceed 2 pieces.
(4) When the pipeline exceeds a certain length, a junction box shall be installed to facilitate threading. Pipes should be compensated for when they pass through settlement joints of building expansion joints.
"Electrical Technology" pre-embedded construction process
5, wire tube dark laying form:
(1) Cast-in-situ concrete slabs, walls, columns, and beams are piped with walls and bricks.
(2) Concealed pipelines shall be constructed in close cooperation with the main civil engineering works and the height of the buildings shall be given during the construction of the main civil works.
(3) The piping shall be reduced as much as possible, along the shortest path, after comprehensive consideration to determine the location and direction of laying of the rational pipeline, determine the correct position of the correct box.
(4) According to the actual laying of the construction drawings, a variety of pipe bending and box boxes are processed.
(5) Determination box and box position
According to the requirements of the construction drawings, the positions of the boxes and boxes are determined. Based on the horizontal lines marked by the civil works, the connected devices are leveled and the actual installation positions of the boxes are marked.
(6) Fixed cassettes
The pipelines and steel bars can be bundled and fixed by iron wire. The distance between the surface of boxes and boxes and the surface of buildings and structures is generally not less than 15mm. The boxes and boxes shall be filled with plastic foam or other fillers to prevent the cement from falling into. Boxes and boxes require a firm and stable placement with correct coordinates.
Electrical piping and pipe threading construction technology
(1) Construction Process
a. The construction procedure for the laying of the dark pipe: construction preparation → prefabricated pipe bending → measuring box position → fixing box, box → piping connection → deformation joint processing → grounding treatment
b. The construction procedures for pipe laying are: construction preparation → prefabricated pipe bending, bracket, hanger → confirm box, box and fixing point location → bracket, hanger fixing → box box fixing → pipe laying and connection → deformation joint Processing → Ground Treatment
c. The construction procedure for the laying of plastic electrical conduits is: construction preparation → bending of prefabricated processing pipe → location of measurement box → fixed box, box → pipeline connection → deformation joint processing
d. The construction procedures for the laying of plastic electrical conduits are: construction preparation → determination of boxes, boxes and fixing points location → brackets, hangers, installation and installation → laying and connection of pipelines → fixing of box boxes → deformation joint processing
e. Pipe threading construction procedures: construction preparation → select wire → threading → sweeping line → take-off and breakages → lashing with wires and strips → with guards → wire connection → wire welding → wire wraps → line inspection insulation shake Measurement
(2) Main construction methods and technical measures
1) Laying of dark pipes
a. The basic requirements for the laying of dark pipes are as follows: The pipelines, nozzles, and pipe connections laid in dusty and humid places shall be sealed; the wire pipes shall be laid along the nearest route and bent as much as possible, buried in the wall. Or the pipe in the concrete, the net distance from the surface should not be less than 15mm; buried underground wireline should not pass through the equipment foundation.
b. Prefabrication:
When the diameter of galvanized steel pipe is 20mm or less, the boring bar is used to bend the pipe; when the pipe diameter is 25mm or more, the hydraulic rammer is used; the bending of the plastic pipe is to be operated with a matching spring.
Pipe cutting: The steel pipe is cut with a hacksaw, a pipe cutter, and a grindstone saw, and the size of the pipe to be cut off is good, and it is firmly cut in the jaws. The cutting edge should be flush and not be skewed. The nozzle should be smooth and smooth with no burrs and the iron in the pipe should be removed. The plastic pipe is operated with a matching pipe cutter.
Steel pipe threading: The steel pipe threading adopts a threading plate, and the corresponding die teeth should be selected according to the outer diameter of the pipe. During the threading process, uniform force must be applied.
c. Determination box and box position: According to the design requirements, determine the position of the box and the box axis. Take the horizontal line of the civil construction as the benchmark, check the line, and mark the actual size and position of the box and box.
d. Fixed boxes, boxes: Stable box, box, and then grouting, required mortar full, smooth and firm, the correct location. Cast-in-situ concrete wall fixed box, box plus iron fixed; cast-in-place concrete floor, the box is plugged with the floor steel bar fixed, after the pipe is allocated, with the construction of concrete poured into the earth to complete the construction.
e. Tubing connection
Galvanized steel pipe must be connected with hose clamps. There must be no clasping phenomenon in the set yarn, smooth and smooth tube mouth, the tube hoop must use the wire pipe hoop, the joint should be firm and tight, the exposed wire should not be more than 2 buckles; the plastic pipe connection should use the matching pipe fittings and adhesives .
When the pipeline exceeds the following length, a junction box shall be installed, and its position shall be convenient for threading. 30m without bends; 20m with one bend; 15m with two bends; 8m with three bends.
Into the box, box connection: box, box opening should be neat and consistent with the diameter of the tube, box, box with hole opener hole, to ensure that the hole is no burr, requires a hole in a tube, not open long hole . It is forbidden to use electric welding and gas welding to open holes in iron boxes and boxes. The steel pipe enters into the box and box, and the nut of the nozzle is used to lock the nut to expose the thread lock 2 to 3 of the lock nut. When the two or more tubes enter the box, the box must be the same length, uniform spacing and neat arrangement; the plastic tube enters the box and the box. Locks should be used for fixing.
f. Tube dark laying method:
With the wall (masonry) piping: with the civil engineering building wall riser, the outer protective layer of the pipe is not less than 15mm, pipe mouth up who should be sealed to prevent cement mortar or other debris blocking the pipe. When there is a ceiling above the pipe, the upper end of the pipe shall be bent into a ceiling at a 90° angle. The pipe leading from the ceiling shall not be too long to reach the upper opening of the switch box. After the partition is installed, the box shall be fixed first. Short tube.
Cast-in-situ concrete floor piping: first determine the position of the box, according to the thickness of the wall, pop-up reticle, the fixed box will be firmly fixed and then pipe. When there are more than two boxes, pull a straight line. The length of the tube into the box should be appropriate, and the pipeline should be fastened with lead wire every 1m or so.
g. After laying down the concealed pipe, on the basis of the self-testing, the owner and supervisory representative shall be promptly notified of the inspection and acceptance, and the inspection and acceptance record for the concealed project shall be filled out in earnest.
2) Pipe laying:
a. The pipe laying process is the same as the pipe laying process. See the construction method of the pipe laying.
b. Prefabrication of pipe bends, brackets, and hangers: The bending radius of pipes in an open or buried brick wall is not less than 6 times the outside diameter of the pipe. The bending radius of the pipe embedded in concrete shall not be less than 10 times the outside diameter of the pipe. Although the specifications of the hanger are not clearly defined in the design drawings, they must not be smaller than the following specifications: Flat iron bracket 30 × 3mm; Angle bracket 25 × 25 × 3mm.
c. Determining the position of the box, box and fixing point: According to the construction drawing, firstly measure the correct position of the box, box and outlet, and then press the measured position to pull the vertical and horizontal lines of the pipe out of the straight line, according to the specified fixed Point spacing size requirements, determine the specific position of the bracket, hanger. The distance between the fixed point should be uniform, and the distance between the tube card and the terminal, the midpoint of the turn, the edge of the electrical appliance or junction box should be 150-300mm, and be consistent; the maximum distance of the middle tube card is as follows:
List of the maximum distances of the middle pipe of the bright pipe
Pipe name
Pipe diameter (mm)
15 to 20
25~32
32 to 40
50 to 65
65 or more
Maximum distance between tube cards (mm)
Wall thickness > 2mm steel pipe
1500
2000
DIN69871 DAT SK40 Tool Holders
1. Spindle conicity standard:DIN69871A
2. ER collet chuck set with ER collet with flexibility used for gripping cutting tool, drill bit, draw bolt and so on.
3. When using, nut should be clamped tensed firstly with cutting tools then locked into the main body.
4. Always use the recommended wrench or spanner, unless, there might cause damage of cutting tools.
5. The spanner,pull stud chuck must purchase alone.
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