A steel strand for coal mine support

Abstract

The utility model discloses a steel strand for coal mine support, comprising a steel strand body and a PE sheath sleeved on the outside of the steel strand body, the front ends of a group of adjacent steel strand bodies are connected by a locking mechanism, and the locking mechanism comprises a mounting shell, a group of jacks, a sliding block, a groove, a spring, a group of clamping blocks, a rotating rod, a rotating handle and a cam. The beneficial effect of the utility model is that the outer surface of the steel strand body is wrapped with a PE sheath, which can play a role in heat resistance and aging resistance, and the grease filled inside improves the wear resistance and corrosion resistance of the steel wire. The locking mechanism uses a group of clamping blocks to lock the ends of a group of adjacent steel strands after installation, thereby playing the purpose of preventing the ends from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of steel strands, in particular to a steel strand used for coal mine support. Background Art

[0002] Steel strand is a steel product composed of multiple steel wires twisted together. The carbon steel surface can be coated with galvanized layer, zinc-aluminum alloy layer, aluminum layer, copper layer, epoxy resin, etc. as needed. As part of the coal mine tunnel support, the bonding strength between the steel strand and the overall structure is crucial.

[0003] The existing patent application number is CN 202223536025.2, which discloses a prestressed steel strand. By setting an anti-scattering end cap, when in use, the main body of the steel strand is inserted into the anti-reverse cavity to achieve overall position limiting, achieving a position limiting effect that prevents the rubber layer and the main body of the steel strand from rotating, and comprehensively achieving an anti-scattering effect. However, the steel strand is composed of multiple steel wires twisted together, and the surface is spiral, which makes it difficult for the main body of the steel strand to be inserted into the anti-reverse cavity, affecting installation and use.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above defects, the utility model provides a steel strand for coal mine support, so as to solve the problem of preventing the ends of the steel strand for coal mine support from loosening.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A steel strand for coal mine support, comprising a steel strand body and a PE sheath sleeved outside the steel strand body, wherein the front ends of adjacent groups of steel strand bodies are connected by a locking mechanism;

[0008] The locking mechanism includes a mounting shell, a group of jacks, a sliding block, a groove, a spring, a group of clamping blocks, a rotating rod, a rotating handle and a cam. The mounting shell is rectangular, a group of jacks are opened on both sides of the front end of the mounting shell, the sliding block is slidably installed in the front end of the mounting shell, the groove is opened in the front end of the sliding block, the spring is installed in the groove and connected to the inner wall of the mounting shell, a group of clamping blocks are movably installed on both sides of the sliding block, the rotating rod is movably inserted at the rear end of the mounting shell, the rotating handle is installed at the upper end of the rotating rod, and the cam is installed at the bottom of the rotating rod, and the front end is in contact with the sliding block.

[0009] Furthermore, the steel strand body includes a central steel wire and twisted steel wires twisted around the outer circumference of the central steel wire.

[0010] Furthermore, grease is filled between the steel strand body and the PE sheath.

[0011] Furthermore, a conical limiting groove is opened at the rear end of the sliding block, and a corresponding conical limiting block is installed in the mounting shell.

[0012] Furthermore, a group of clamping blocks are respectively provided with inclined sliding grooves, and both sides of the upper end of the sliding block are slidably installed in the corresponding inclined sliding grooves through a group of circular sliding blocks.

[0013] The utility model provides a steel strand for coal mine support, which has the following beneficial effects: the outer surface of the steel strand body is wrapped with a PE sheath, which can play a role in heat resistance and aging resistance, and the grease filled inside improves the wear resistance and corrosion resistance of the steel wire. The locking mechanism adopts a group of clamping blocks to lock the ends of a group of adjacent steel strands after installation, thereby preventing the ends from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of a steel strand for coal mine support.

[0015] Figure 2 It is a schematic diagram of the steel strand body described in the utility model.

[0016] Figure 3 This is a schematic diagram of the sliding block of the utility model.

[0017] Figure 4 It is a top view of the installation shell of the utility model.

[0018] Figure 5 This is a cross-sectional view of the installation shell of the utility model.

[0019] In the figure: 1. Steel strand body; 2. PE sheath; 3. Mounting shell; 4. Socket; 5. Sliding block; 6. Groove; 7. Spring; 8. Clamping block; 9. Rotating rod; 10. Rotating handle; 11. Cam; 12. Center steel wire; 13. Twisted steel wire; 14. Grease; 15. Conical limit groove; 16. Conical limit block; 17. Inclined slide groove; 18. Round slider. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1-5As shown: a steel strand for coal mine support, comprising a steel strand body 1 and a PE sheath 2 sleeved on the outside of the steel strand body 1, the front ends of a group of adjacent steel strand bodies 1 are connected by a locking mechanism; the locking mechanism comprises a mounting shell 3, a group of jacks 4, a sliding block 5, a groove 6, a spring 7, a group of clamping blocks 8, a rotating rod 9, a rotating handle 10 and a cam 11, the mounting shell 3 is rectangular, a group of jacks 4 are opened on both sides of the front end of the mounting shell 3, the sliding block 5 is slidably installed in the front end of the mounting shell 3, the groove 6 is opened in the front end of the sliding block 5, the spring 7 is installed in the groove 6 and connected to the inner wall of the mounting shell 3, and a group of clamping blocks 8 are movably installed on both sides of the sliding block 5 The rotating rod 9 is movably inserted in the rear end of the mounting shell 3, the rotating handle 10 is installed at the upper end of the rotating rod 9, the cam 11 is installed at the bottom of the rotating rod 9, and the front end is in contact with the sliding block 5; the steel strand body 1 includes a central steel wire 12 and a twisted steel wire 13 twisted on the outer circumference of the central steel wire 12; grease 14 is filled between the steel strand body 1 and the PE sheath 2; a conical limiting groove 15 is opened in the rear end of the sliding block 5, and a corresponding conical limiting block 16 is installed in the mounting shell 3; a group of clamping blocks 8 are respectively opened with inclined sliding grooves 17, and the upper ends of the sliding block 5 are slidably installed in the corresponding inclined sliding grooves 17 through a group of circular sliders 18 on both sides.

[0021] Working principle of this embodiment: The steel strand body 1 includes a central steel wire 12 and a stranded steel wire 13 twisted around the outer circumference of the central steel wire 12. Grease 14 is filled between the steel strand body 1 and the PE sheath 2. Figure 2 As shown, the outer surface of the steel strand body 1 is wrapped with a PE sheath 2, which can play a role in heat resistance and aging resistance, and the grease 14 filled inside improves the wear resistance and corrosion resistance of the steel wire;

[0022] When locked: the mounting shell 3 is rectangular, a group of jacks 4 are opened on both sides of the front end of the mounting shell 3, the sliding block 5 is slidably installed in the front end of the mounting shell 3, the groove 6 is opened in the front end of the sliding block 5, the spring 7 is installed in the groove 6 and connected to the inner wall of the mounting shell 3, a group of clamping blocks 8 are movably installed on both sides of the sliding block 5, the rotating rod 9 is movably inserted in the rear end of the mounting shell 3, the rotating handle 10 is installed at the upper end of the rotating rod 9, the cam 11 is installed at the bottom of the rotating rod 9, and the front end contacts with the sliding block 5, a conical limiting groove 15 is opened in the rear end of the sliding block 5, and a corresponding conical limiting block 16 is installed in the mounting shell 3, a group of clamping blocks 8 are respectively opened with inclined slide grooves 17, and the two sides of the upper end of the sliding block 5 are slidably installed in the corresponding inclined slide grooves 17 through a group of circular sliders 18, and the initial position of the sliding block 5 is as shown Figure 5 As shown, during installation, the user first inserts the ends of a group of adjacent steel strand bodies 1 into a group of insertion holes 4, and then rotates the handle 10 clockwise to drive the cam 11 to deflect 90° to the right, as shown in FIG. Figure 1As shown, at the same time, the spring 7 pushes the sliding block 5 to move backward, so that the conical limit block 16 is stuck in the conical limit groove 15, and the two groups of circular sliders 18 drive a group of clamping blocks 8 to move relatively outward, locking the ends of an adjacent group of steel strand bodies 1, thereby preventing the ends from loosening. A boss is installed at the rear end of the mounting shell 3 to limit a group of clamping blocks 8 to move only left and right.

[0023] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A steel strand for coal mine support, comprising a steel strand body (1) and a PE sheath (2) sleeved on the outside of the steel strand body (1), characterized in that: The front ends of adjacent groups of steel strand bodies (1) are connected via a locking mechanism; The locking mechanism comprises a mounting shell (3), a group of jacks (4), a sliding block (5), a groove (6), a spring (7), a group of clamping blocks (8), a rotating rod (9), a rotating handle (10) and a cam (11). The mounting shell (3) is rectangular, the group of jacks (4) are opened at both sides of the front end of the mounting shell (3), the sliding block (5) is slidably mounted at the front end of the mounting shell (3), the groove (6) is opened at the front end of the sliding block (5), the spring (7) is installed in the groove (6) and connected to the inner wall of the mounting shell (3), a group of clamping blocks (8) are movably mounted on both sides of the sliding block (5), the rotating rod (9) is movably inserted at the rear end of the mounting shell (3), the rotating handle (10) is installed at the upper end of the rotating rod (9), and the cam (11) is installed at the bottom of the rotating rod (9), and the front end contacts the sliding block (5).

2. The steel strand for coal mine support according to claim 1, characterized in that: The steel strand body (1) comprises a central steel wire (12) and twisted steel wires (13) twisted around the outer circumference of the central steel wire (12).

3. The steel strand for coal mine support according to claim 1, characterized in that: Grease (14) is filled between the steel strand body (1) and the PE sheath (2).

4. The steel strand for coal mine support according to claim 1, characterized in that: A conical limiting groove (15) is formed at the rear end of the sliding block (5), and a corresponding conical limiting block (16) is installed in the mounting shell (3).

5. The steel strand for coal mine support according to claim 1, characterized in that: A group of clamping blocks (8) are respectively provided with inclined sliding grooves (17), and both sides of the upper end of the sliding block (5) are slidably installed in the corresponding inclined sliding grooves (17) through a group of circular sliding blocks (18).

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