Calculation method of 15 degree climb of cable tray

15 degree climbing formula for cable tray

Hypotenuse length=climbing height*sin15

The bridge method is based on the formula for climbing bends, and the cutout size is calculated based on the height of the bridge. For example, when the bridge height is 100, the incision is 2.7cm, when the height is 150, the incision is 4.05cm, and when the height is 200, the incision is 5.4cm. Multiply the height of the climb by 2, and then remember the side line to the center line and the center line to the side line when drawing the line.

Extended information:

In order to make the slope gentler, I did not completely follow the angle formula to cut. Instead, I only used a distance of 6 centimeters for the bridge. After months of practice, I found that using smaller values ​​makes the slope smoother, while using larger values ​​makes the slope steeper. Therefore, when you need to climb a long distance, I recommend cutting according to the angle formula to ensure that the slope is reasonable.

Calculation formula for climbing 45-degree turns:

How to make a 45° horizontal elbow: tan22.5=a/400 a=tan22.5x400=0.4142x400= 165.6854 mm

Bottom 2a=107.1797x2=214.3594 (mm)

tan15° and tan22.5° can be calculated by computer

Cable trays are divided into trough type, tray type, ladder type and grid type structures. It consists of brackets, brackets and mounting accessories. It can be erected independently or laid on various buildings (structures) and pipe gallery supports. The characteristics of cable tray include simple structure, beautiful appearance, flexible configuration and easy maintenance.

All parts need to be galvanized and installed on an open-air bridge outside a building. If it is near the seaside or in a corrosive area, the material must have anti-corrosion, moisture resistance, good adhesion, and high impact resistance. Features.

The load of the cable tray is divided into static load, dynamic load and additional load.

Reference materials: Encyclopedia-Bridge

Calculation method of short pipe between two 45 degree elbows

Calculation method:

The center length minus the height of the elbows on both sides is the length of the short pipe in the middle.

For example: For DN100 pipe, the length of the 45-degree elbow is equal to the inner diameter of the pipe multiplied by 1.5 times 0.414.

45 degree elbow 45 degree elbow is a pipe fitting and pipe connector. Used at branch pipes of main pipelines. Connect two pipes with the same or different nominal diameters to change the direction of the pipes 45 degrees.

1.5 times the elbow center height = diameter * 1.524, which is actually the diameter * multiple. The number after the decimal point of the result is rounded to an integer. For example, the diameter of 219 is 200, and the center height is 200*1.524=304.8, which is 305.

Another example is that the diameter of 114 is 100, the center height is: 100*1.524=152.4, take 152. This method is convenient and quick to calculate, and is suitable for the algorithm of elbow curvature radius of DN100 and above.

Note: In the pipeline system, elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are three most commonly used elbows: 45°, 90° and 180°. In addition, according to project needs, other abnormal angle elbows such as 60° are also included. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics, etc.

Extended information:

Elbow is a commonly used connecting pipe fitting in plumbing installation. It is used to connect pipe corners and change the direction of pipes. The methods of connecting to pipes include: direct welding flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection, etc. According to the production process, it can be divided into: welding elbow, stamping elbow, push elbow, casting elbow, butt welding elbow, etc.

A commonly used connecting pipe fitting in pipeline installation. It connects two pipes with the same or different nominal diameters to make the pipeline turn at a certain angle. The nominal pressure is 1-1.6Mpa. A bending radius less than or equal to 1.5 times the pipe diameter is an elbow, and a bending radius greater than 1.5 times the pipe diameter is an elbow. The elbow connects two pipes with the same or different nominal diameters, allowing the pipes to make turns of 90°, 45°, 180° and various degrees.

Since most elbow pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled, leaving a certain angle and a certain edge. This requirement is also relatively strict. How thick the edge is, the angle is The amount and deviation range are specified. The surface quality and mechanical properties are basically the same as those of pipes. For the convenience of welding, the steel grade of the pipe fittings and the pipes being connected is the same.

Reference source: Encyclopedia-Elbow

Reference source: Encyclopedia-Short Tube

How to use the geometric calculator formula to calculate bridge bending

Raw material bridge straight-through, line drawing tool pen, square ruler, bridge calculator

Cutting toolsHand grinder, hammer, meter ruler, jackhammer

1. The calculation of the elbow degree can be calculated using the formula! For example: the formula for a 30-degree up and down climbing elbow is x=0.536*e.

2. In addition, you can also use the bridge calculator to calculate the result, which is the same as the formula calculation result. The first is that it is convenient to calculate directly.

3. Calculate the result according to the formula.

4. After drawing the upper bending line, cut it with a hand grinder to make sure where there are cuts, and merge them after cutting.

5. After cutting the upper bend, the next step is to calculate the hypotenuse size: 2 multiplied by the climb size equals the hypotenuse size.

Extended information

Notes on production:

1. According to the Pythagorean law: c2=a2 b2, a=b in an isosceles right triangle, then according to the Pythagorean law, c2=2a2 or c2=2b2, so: C=√2 √2=1.414, in practical application Just take approximately 1.41.

2. When cutting and taking corners, keep one side of the triangle uncut, leaving it for bending and screwing. During construction, in order to ensure that the cables are not damaged due to damage and macroscopic craftsmanship, the bridge turns must be smooth and there should be no dead right angles as much as possible. Two 45-degree bends must be used to complete a 90-degree bend.

3. Make a 45-45 degree vertical 90-degree bend: Take the bridge width multiplied by 0.4 to get the value W. Draw the center line at the required place and measure W on both sides to form a triangle. Then cut the line to be cut and bend it. Serve.

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