Diamond wire saw connecting device and closed-loop diamond wire saw

Abstract

The utility model discloses a diamond wire saw connecting device and a closed-loop diamond wire saw. The diamond wire saw connecting device comprises a connector sleeve connected with the head end and the tail end of a steel wire rope and a connector mandrel arranged in the connector sleeve, the connector sleeve is of a cylinder structure with a hollow cavity, and the inner surface of the hollow cavity is of a smooth surface structure. The joint core shaft is arranged in the hollow cavity of the joint sleeve, the joint core shaft is in axial symmetry and has a conical appearance structure with a large middle part and two small ends, the diameters of the two ends of the joint core shaft are equal to the diameter of a central strand of the steel wire rope, and the taper angles alpha of the two ends of the joint core shaft are 2-10 degrees. According to the connecting device, after the connector sleeve is tightly pressed from outside to inside through a special clamp, the connector sleeve is changed into an irregular shape with the large middle and the two small ends, a steel wire rope is effectively prevented from slipping off from the connector of the rope saw when the rope saw works at a high speed, safety accidents are prevented, and various economic losses caused by rope breakage are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of diamond wire saws, and particularly relates to a diamond wire saw connecting device and a closed-loop diamond wire saw. Background Technique

[0002] Diamond wire saws are widely used as tools for cutting materials such as stone and concrete, and mainly consist of components such as steel wires and beads sleeved on the steel wires at intervals. When cutting materials such as stone and concrete, since a closed-loop or strip-shaped diamond wire saw is required, the head and tail of the strip-shaped diamond wire saw need to be joined end to end to form a closed-loop diamond wire saw. Specifically, during cutting, the diamond wire saw is sleeved on the driving wheel, driven wheel, guide wheel of the wire saw machine and the workpiece to be cut. Driven by a motor, the diamond wire saw moves in a fixed direction to cut hard objects such as stone and reinforced concrete.

[0003] In the prior art, there are two methods for connecting the head and tail of a strip-shaped diamond wire saw into a closed-loop diamond wire saw, namely braided connection and connection with a joint. For diamond wire saws used in stone mine exploitation and sawing of concrete structural components, etc., since the wire saw needs to be threaded into the stone or concrete structural component before each sawing, therefore, the head and tail of such diamond wire saws need to be connected with a joint.

[0004] Once the wire saw joint slips off the wire saw steel wire during sawing, due to the high-speed movement of the wire saw, it will not only cause great damage to the wire saw itself, but also cause great harm to the surrounding people and objects. The traditional head-to-tail connection is through a cylindrical metal joint sleeve. The head and tail of the steel wire rope are placed inside the joint sleeve, and the joint sleeve is pressed from the outside to the inside by a hydraulic press, so that the inner side of the joint sleeve is in close contact with the steel wire rope and connected. The inner wall of the existing joint sleeve is mostly a straight structure (i.e., a smooth structure), and the firmness is not good. During the high-speed operation of the wire saw, the steel wire rope is easy to fall off from the wire saw joint part, resulting in safety accidents and affecting the cutting efficiency. The utility model patent with the publication number CN217729232 U proposes a wire saw joint with a raised wall and a sunken wall arranged in sequence on the inner wall of the joint sleeve. By forming a concave-convex structure on the inner wall of the wire saw joint, it fully squeezes into the gap between the wire saw strands, strengthens the friction between the wire saw and the wire saw joint to prevent the wire saw joint from falling off, thereby improving the working efficiency and safety of the wire saw cutting operation, and extending the service life and cutting efficiency of the wire saw. The working principle of this wire saw joint is that under the action of external force, the side strands of the steel wire rope are pressed into the inner wall of the joint sleeve, so that the steel wire rope is not easy to slip off the joint sleeve under the action of tension. Based on the above principle, the joint sleeve material can only be selected from 15# or 20# steel with lower strength. In actual application, the application effect of designing the inner wall of the joint sleeve into a raised wall and a sunken wall structure is not much different from that of designing the inner wall of the joint sleeve into a smooth wall structure. Designing the inner wall of the joint sleeve into a raised wall and a sunken wall structure instead increases the processing difficulty, and the selected steel with lower strength is also easy to break. Due to the limited depth of the side strands of the steel wire rope pressed into the inner wall of the joint sleeve, during the operation of the wire saw, the steel wire rope still often slips off the joint sleeve, resulting in economic losses such as damage to the diamond wire saw, sawing equipment, and stone materials, and reduction of sawing efficiency due to the closed-loop connection of the steel wire rope, and serious safety accidents such as casualties.

[0005] Based on the above deficiencies, the principle of the utility model solution proposed in this application is: under the action of external force, the inner wall of the joint sleeve forms an irregular shape that is large in the middle and small at both ends, that is, a wedge-shaped structure is formed together with the steel wire rope and the joint mandrel. At the same time, the side strands of the steel wire rope can also be pressed into the inner wall of the joint sleeve. The joint sleeve material can be selected from 25# to 45# steel with higher strength, which improves the deficiencies of the existing wire saw joint, thereby greatly reducing the probability of the steel wire rope slipping off the joint sleeve during the operation of the wire saw. Utility Model Content

[0006] The technical problem to be solved by the present utility model is to provide a diamond wire saw connecting device and a closed-loop diamond wire saw in which the steel wire rope is not easy to fall off from the wire saw joint.

[0007] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0008] A diamond wire saw connecting device includes a joint sleeve connecting the head and tail ends of a steel wire rope. The joint sleeve is of a hollow cylindrical structure, and the inner surface of the hollow cavity of the joint sleeve is a smooth surface structure. It is characterized in that it further includes a joint core shaft arranged in the hollow cavity of the joint sleeve. The joint core shaft is axially symmetric and has a conical outer shape structure with a larger middle and smaller ends. The diameters of the two ends of the joint core shaft are equal to the diameter of the central strand of the steel wire rope, and the taper angles α at both ends of the joint core shaft are both 2 to 10 degrees.

[0009] Further, the inner diameter of the hollow cavity of the joint sleeve is slightly larger than the sum of the maximum diameter of the joint core shaft and the diameters of two side strands of the steel wire rope. More preferably, it is 0.1 to 0.5 mm larger than the sum of the maximum diameter of the joint core shaft and the diameters of two side strands of the steel wire rope.

[0010] Further, preferably, the taper angles α at both ends of the joint core shaft are both 3 to 5 degrees.

[0011] Further, the length of the joint core shaft is 15 to 22 mm, and the length of the joint sleeve is 1 to 3 mm longer than the length of the joint core shaft.

[0012] Further, the material of the joint sleeve is selected from 25# to 45# steel, and the joint core shaft is preferably made of 45# quenched and tempered steel. The present invention also provides a closed-loop diamond wire saw, including:

[0013] A steel wire rope;

[0014] Multiple beads sleeved on the steel wire rope; and

[0015] The above-mentioned diamond wire saw connecting device, which fixes the head and tail ends of the steel wire rope together to form a closed loop.

[0016] Compared with the prior art, the connecting device of the present invention uses a joint sleeve with a still straight inner wall structure in cooperation with a joint core shaft of a specific shape. The joint core shaft is designed to be axially symmetric and have a conical outer shape structure with a larger middle and smaller ends. The taper angle formed by the maximum diameter of the joint core shaft and any one end of the joint core shaft. After using a special clamp to press the joint sleeve from the outside to the inside, the inner wall of the joint sleeve becomes an irregular shape with a larger middle and smaller ends, forming a wedge-shaped structure together with the steel wire rope and the joint core shaft. At the same time, the side strands of the steel wire rope can also be pressed into the inner wall of the joint sleeve. The material of the joint sleeve is selected from 25# to 45# steel with higher strength, thereby effectively reducing or even avoiding the probability of the steel wire rope slipping out of the wire saw joint during high-speed operation. It not only prevents the occurrence of safety accidents such as casualties, but also avoids economic losses caused by diamond wire saws, sawing equipment, and stone damage due to broken ropes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic structural diagram of an embodiment of the diamond wire saw connecting device of the present utility model.

[0018] Figure 2 For Figure 1 Schematic structural diagram of the connecting mandrel in the shown embodiment.

[0019] Figure 3 Schematic structural diagram of the closed-loop diamond wire saw of the present utility model.

[0020] The reference numerals in the figure are:

[0021] 1 Adhesive, 2 Steel wire rope, 2-1 Side strand, 2-2 Center strand, 3 Diamond wire saw connecting device, 3-1 Joint sleeve, 3-2 Joint mandrel, 4 Bead, 4-1 Matrix working layer, 4-2 Substrate. Specific embodiments

[0022] In order to better explain the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings, but the embodiments of the present utility model are not limited thereto.

[0023] See Figures 1 to 2 , the diamond wire saw connecting device 3 provided by the present utility model includes a joint sleeve 3-1 connecting the head and tail ends of the steel wire rope 2 and a joint mandrel 3-2 disposed in the joint sleeve 3-1. The joint sleeve 3-1 has a columnar structure with a hollow cavity, and the inner surface of the hollow cavity is a smooth surface structure, that is, a flat structure, as Figure 1 shown; the joint mandrel 3-2 is disposed in the hollow cavity of the joint sleeve 3-1. The joint mandrel 3-2 is axisymmetric and has a conical outer shape structure with a large middle and small ends. The diameters of both ends of the joint mandrel 3-2 are equal to the diameter of the center strand 2-2 of the steel wire rope 2, and the taper angles α on both sides of the joint mandrel 3-2 are both 2 to 10 degrees, as Figure 2 shown.

[0024] In the above technical solution, the steel wire rope 2 can adopt a structure of 6 side strands 2-1 + 1 center strand 2-2, a structure of 19 side strands 2-1 + 1 center strand 2-2 or other structures according to needs, and the center strand 2-2 is a steel core strand.

[0025] The structure of the joint core shaft 3-2 in the above technical solution can be understood as a structure composed of two identical truncated cones connected together, specifically a structure composed of two truncated cones connected together in a manner that the lower bottom surfaces (the bottom surface with a larger diameter) are relatively connected. In this structure, the cone angle of each truncated cone is 2 to 10 degrees, and more preferably 3 to 5 degrees; the diameters of the bottom surfaces of the two truncated cones are equal to the diameter of the central strand 2-2 of the wire rope 2, and the sum of the heights of the two truncated cones is the length of the joint core shaft 3-2. In this application, the length of the joint core shaft 3-2 is usually 15 to 22 mm, and the length of the joint sleeve 3-1 is 1 to 3 mm longer than the length of the joint core shaft 3-2.

[0026] Before using the diamond wire saw connection device 3 of the utility model, first cut off a part of the center strand 2-2 at the head and tail ends of the wire rope 2 (preferably, the length of the cut part is equal to 1 / 2 of the length of the joint mandrel 3-2), insert the joint mandrel 3-2 into the side strand 2-1 at one end of the wire rope 2, and then put the joint sleeve 3-1 on the side strand 2-1 of the wire rope 2 at this end, and then put the side strand 2-1 at the other end of the wire rope 2 into the space between the joint sleeve 3-1 and the joint mandrel 3-2 again, so that the side strands 2-1 at both ends of the wire rope 2 are in contact, and the joint sleeve 3-1 is symmetrical with respect to the contact surface of the side strands 2-1 at both ends of the wire rope 2. After completing the above operations, use special pliers to press the joint sleeve 3-1 from the outside to the inside to complete the assembly of the connection device 3. After the joint sleeve 3-1 is clamped, the joint sleeve 3-1 becomes an irregular shape with a large middle and small ends, thereby preventing the joint sleeve 3-1 from slipping off the two side strands 2-1 of the wire rope when the diamond wire saw is working at high speed, effectively preventing the occurrence of safety accidents, and also avoiding economic losses caused by damage to the diamond wire saw, sawing equipment, stone, etc. due to broken rope.

[0027] Based on the fact that when the connecting device 3 of the utility model is used, the side strand 2-1 of the steel wire rope 2 is wound around the joint core shaft 3-2 and then placed in the joint sleeve 3-1. Therefore, the inner diameter of the hollow cavity in the joint sleeve 3-1 should be slightly larger than the sum of the maximum diameter of the joint core shaft 3-2 and the diameters of the two side strands 2-1 of the steel wire ropes 2, and further preferably, it is 0.1 to 0.5 mm larger than the sum of the maximum diameter of the joint core shaft 3-2 and the diameters of the two side strands 2-1 of the steel wire ropes 2.

[0028] The material for making the joint sleeve 3-1 can be 25# to 45# steel, and the joint core shaft 3-2 is preferably made of 45# quenched and tempered steel.

[0029] See also Figure 3 The utility model also provides a closed-loop diamond wire saw for cutting materials such as stone and concrete, comprising:

[0030] Wire rope 2;

[0031] A plurality of beads 4, wherein the plurality of beads 4 are fixed to the steel wire rope 2 by an adhesive 1; and

[0032] The above-mentioned diamond wire saw connecting device 3 fixes the head and tail ends of the steel wire rope 2 together to form a closed loop.

[0033] Among them, as described above, the steel wire rope 2 can adopt a structure of 6 side strands 2-1 + 1 center strand 2-2, a structure of 19 side strands 2-1 + 1 center strand 2-2, or other structures. The center strand 2-2 is a steel core strand. The bead 4 includes a matrix working layer 4-1 and a matrix 4-2. The matrix working layer 4-1 is arranged on the matrix 4-2, and the matrix 4-2 is arranged on the steel wire rope 2 through an adhesive.

Claims

1. A diamond wire saw connection device (3), comprising a joint sleeve (3-1) connecting the head and tail ends of a wire rope (2), the joint sleeve (3-1) being a hollow cylindrical structure, the inner surface of the hollow cavity of the joint sleeve (3-1) being a smooth surface structure, characterized in that: The invention also comprises a joint core shaft (3-2) arranged in the hollow cavity of the joint sleeve (3-1), wherein the joint core shaft (3-2) is axially symmetrical and has a conical shape structure with a large middle portion and small ends, the diameters of the two ends of the joint core shaft (3-2) are equal to the diameter of the central strand (2-2) of the steel wire rope (2), and the cone angles α at both ends of the joint core shaft (3-2) are 2 to 10 degrees.

2. The diamond wire saw connection device (3) according to claim 1, characterized in that: The inner diameter of the hollow cavity in the joint sleeve (3-1) is slightly larger than the sum of the maximum diameter of the joint core shaft (3-2) and the diameters of the side strands (2-1) of the two steel wire ropes (2).

3. The diamond wire saw connection device (3) according to claim 1, characterized in that: The length of the joint core shaft (3-2) is 15 to 22 mm.

4. The diamond wire saw connection device (3) according to any one of claims 1 to 3, characterized in that: The length of the joint sleeve (3-1) is 1 to 3 mm longer than that of the joint core shaft (3-2).

5. The diamond wire saw connection device (3) according to any one of claims 1 to 3, characterized in that: The cone angles α at both ends of the joint core shaft (3-2) are 3 to 5 degrees.

6. The diamond wire saw connection device (3) according to any one of claims 1 to 3, characterized in that: The inner diameter of the hollow cavity in the joint sleeve (3-1) is 0.1 to 0.5 mm larger than the sum of the maximum diameter of the joint core shaft (3-2) and the diameters of the side strands (2-1) of the two steel wire ropes (2).

7. The diamond wire saw connection device (3) according to any one of claims 1 to 3, characterized in that: The material of the joint sleeve (3-1) is 25# to 45# steel, and the material of the joint core shaft (3-2) is 45# quenched and tempered steel.

8. A closed loop diamond wire saw, characterized in that: include: Steel wire rope (2); A plurality of beads (4), wherein the plurality of beads (4) are sleeved on the steel wire rope (2); A diamond wire saw connecting device (3) as claimed in any one of claims 1 to 7, wherein the connecting device (3) fixes the head and tail ends of the steel wire rope (2) together to form a closed loop.

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