Installation standard of steel wire rope buckle and installation specification of steel wire rope buckle

Installation standard of steel wire rope snap and installation specification of steel wire rope snap. Butt joint of six strand steel wire rope: the small joint method is to disassemble the single strand of two fly heads and knit the strands of two rope heads together in a certain way. Within the range of the joint, the strands of the two ropes are joined together, so the rope head becomes thicker. That's right

Butt joint of six strand wire rope:

The small connection method is to disassemble the single strands of the two fly heads and knit the strands of the two rope heads together in a certain way. Within the range of the joint, the strands of the two ropes are joined together, so the rope head becomes thicker. Such a butted rope is generally not used at the place where it passes through the pulley, but only for increasing the length of the rope. Its joint length is relatively short, which is generally specified as (40~50). d。 If the rope is used in important parts, the length of the joint can be extended to (80~100). d. Therefore, the docking method is also called short insertion.

The large connection method of steel wire rope is mostly used for the transportation of endless rope winch and the connection of winch steel wire rope and joint. For example, the steel wire rope used in the endless rope transportation system of the mine is required to be 4000m long, but the length of domestic steel wire rope is generally 1000m/ piece. In this case, the user needs to request the manufacturer to order 4000m steel wire rope. If the manufacturer can not supply goods to the site, it is necessary to use the method of lengthening to connect the two steel wire rope joints together. The quality of this joint is required to be high. It is required to ensure that the thickness of the joint of the steel wire rope is similar to that of the original steel wire rope (it should be slightly thinner actually), so that the steel wire rope can smoothly pass through the wheel groove and be neatly arranged on the drum during operation. Practice has proved that the tensile resistance of the steel wire rope at the joint can fully meet the tensile resistance of the original design steel wire rope.

The length of a single strand is generally 180 times the diameter of the steel wire rope, that is, the length of the broken end of a steel wire rope shall be greater than 3*180 d. The total length of both ends is 2*3*180 d。 For example, if d24.5 steel wire rope is inserted once, it must be inserted 2*3*180*24.5=26460mm. Therefore, the large insertion method is also called the long insertion method. In the transportation system of endless rope winch, the steel wire rope passes through the guide tail wheel, tensioning wheel, rope pressing wheel, friction roller, etc., so the large connection method must be used.

Diagram of wire rope weaving steps

Hand stitching

The method of manually inserting and weaving six strand steel wire rope with alternating twist fiber rope core or metal rope core to make sling buckle with collar is also applicable to buckle without collar.

method

1: The plug-in joint is made by five times of insertion, and the five times of insertion can be composed of three times of whole strand insertion and two times of reduced strand insertion. All plug joints shall be opposite to the lay direction of the steel wire rope; Except for the first group, the tail ends of all strands inserted in other groups shall be opposite to the lay direction of the steel wire rope.

2: The interleaving shall be carried out in the way of one up and one down.

3: If the steel wire rope has a fiber main core, the core shall be completely penetrated along with the first tail end of the first group, and then the exposed core shall be cut off. If the strand has a fiber core, the core shall remain in the original strand.

4: If the steel wire rope has an independent metal wire rope core, the core shall be divided into three parts, namely:

Two shares;

Two shares;

Two strands plus their cores.

The three parts shall be spliced with three staggered tail ends, and only the three complete connectors shall be penetrated.

5: If the steel wire rope has an independent metal wire strand core, the core shall be folded inward when the first group is inserted, and then fully inserted upward into the center of the splicing head for five complete penetrations.

6: All insertion shall be firmly tightened until it is consistent with the center line of the inserted steel wire rope. In order to make the inserted parts smooth and round, appropriate tools should be used for shaping to make them enter the appropriate position.

prepare

1: The collar shall be clamped on the vice and the wire rope shall pass through the collar so that the main part of the wire rope is on the right and the free end is on the left.

2: The steel wire rope shall be tied to the collar at the top of the ring and both sides of the collar, or they shall be fixed with the collar clamp.

3: Untie the strands of the wire rope. The strand end of the steel wire rope without pre deformation shall be firmly bound.

4: The arrangement of wire rope and collar shall be as shown in Figure A1.

The arrangement of steel wire rope and collar shall be as shown in the figure

Initial stage of splicing

The initial method of interpolation is illustrated in Figure A2 and explained in detail in table A1.

Group 4 and 5 interleaved

A5.1 after the third group is inserted, part of the steel wire can be cut from each strand to reduce the tail end. The center of the remaining steel wire strands shall be twisted reversely into the structure that reduces the steel wire strands.

A5.2 the fourth and fifth groups shall be inserted with the reduced tail end according to the method specified in A2.2 or A2.3. In order to make the inserted parts smooth and round, appropriate tools should be used for shaping to make them enter the appropriate position.

Installation standard of steel wire rope snap

Installation standard of steel wire rope snap

Generally, the number of steel wire rope clips shall not be less than 3-5, and the spacing of clips shall be ≥ 6 times the diameter of the steel wire rope, and the distance between the last clip and the rope head ≥ The number of 140mm clips depends on the diameter of the steel wire rope, ≤ 3 for 10mm, 4 for 10-20mm, 5 for 21-26mm, 6 for 25-36mm and 7 for 36-40mm.

Steel wire rope clamps shall be used together. When the rope diameter is less than 10mm, the number of rope clamps shall not be less than 3, and when the rope diameter is 10-20mm, the number of rope clamps shall not be less than 4. The spacing between rope clamps is 6-8 times the diameter of steel wire rope. The saddle shall be placed on the side of the stressed rope and the U-shaped snap ring shall be placed on the side of the returned short rope for the rope clamp. It is strictly prohibited to arrange the front and back.

Pay attention to the following points when using the steel wire rope collet:

a) When selecting the collet, the inner clear distance of the U-ring shall be 1 ~ 3mm larger than the diameter of the steel wire rope. If it is too large, the buckle connection is not tight, and accidents are likely to occur.

b) When installing the collet, be sure to tighten the bolt until the rope is flattened by 1 / 3 ~ 1 / 4 diameter. After the rope is stressed, tighten the collet bolt again to ensure that the joint is firm and reliable.