Anchored cable gradient let-in damper

Abstract

The utility model belongs to the technical field of safety insurance, concretely relates to a gradient pressure damper of anchor cable. Including can be fitted in the positioning sleeve of constituting anchor cable end, the positioning sleeve is constituted by positioning ring and sleeve of integral structure with it, the sleeve lower part of constituting the positioning sleeve is sleeved with the variant ball cover, the variant ball cover is connected with sleeve between and forms the annular groove with the positioning ring of constituting the positioning sleeve, at least one sleeve type pipe cover is provided in annular groove. Since the anchor cable through the damper sleeve, when its tensile stress becomes big, the annular deformation cover of constituting pressure damper, variant ball cover can be flattened in turn and deformed, forms the pressure release of anchor cable tension force in turn, effectively avoids the problem that anchor cable breaks and causes its failure, the pressure damper has the advantages of compact structure, safe use, economic durability.

Description

Technical Field

[0001] This utility model belongs to the field of anchor cable accessories technology, specifically relating to an anchor cable gradient pressure damper. Background Technology

[0002] Anchor cables are currently the most basic component of coal mine roadway support, reinforcing the surrounding rock of the roadway and achieving self-support of the surrounding rock (coal) strata. As one of the main support forms for underground roadway engineering and rock slopes, anchor cables play an important role in maintaining the stability of roadways and rock (coal) strata slopes, especially in jointed and fractured rock masses, where the reinforcement effect of anchor cables on the rock mass is very significant. In October 2024, the applicant applied for an anchor cable gradient yielding damper. The structure of the anchor cable gradient yielding damper includes: a positioning sleeve fitted on the upper part of the anchor cable, the positioning sleeve consisting of a positioning ring and a sleeve integrally formed therewith; a deformable ball sleeve fitted on the lower part of the sleeve constituting the positioning sleeve, the deformable ball sleeve having a socket-and-extension connection with the sleeve and forming an circumferential groove with the positioning ring constituting the positioning sleeve; at least one annular deformable sleeve is provided within the circumferential groove. However, in this structure, when the crust, mountain, or rock strata within the enclosure move and change, the axial cross-sections of the upper and lower annular deformable sleeves are composed of an upper supporting vertical ring and an upper radial support ring, and a lower supporting vertical ring and a lower radial support ring, respectively forming an "L" structure of upper and lower stacked rings. Therefore, when the upper and lower annular deformable sleeves are directly inserted into the sleeve, the deformable spherical sleeve may directly break through the lower radial support ring, causing the entire anchor cable gradient to cause the pressure damper to become unstable. Utility Model Content

[0003] The purpose of this invention is to provide an anchor cable gradient pressure damper for use with anchor cables. Specifically, when the mine pressure increases to a level where the anchor cable does not break, the deformation of the anchor cable gradient pressure damper reduces pressure on the rock (coal) stratum, effectively releasing pressure and overcoming the problem of anchor cable breakage, thus achieving effective support for the rock (coal) stratum.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An anchor cable gradient pressure damper includes a positioning sleeve (1) that can be fitted onto the end of an anchor cable (4). The positioning sleeve is composed of a positioning ring (11) and a sleeve (12) integrally formed therewith. A deformable ball sleeve (2) is fitted onto the lower part of the sleeve (12) constituting the positioning sleeve. The deformable ball sleeve (2) is inserted and retracted with the sleeve (12) and forms an circumferential groove with the positioning ring (11) constituting the positioning sleeve. A protective outer sleeve mechanism consisting of upper and lower protective outer sleeves (71, 72) is provided from the upper part of the positioning ring (11) to the lower part of the deformable ball sleeve (2). The feature is that at least one sleeve-type tube sleeve is provided in the circumferential groove.

[0005] Additional technical features constituting the above-mentioned anchor cable damper also include: The number of the sleeve-type sleeves is one, and an outward rectangular ring integrally formed with the sleeve is provided in the middle of the sleeve; The sleeve is progressively thicker from top to bottom; 3. There are two or more sleeve-type tubes, wherein the bottom of the upper or lower sleeve-type tube is provided with an outward rectangular ring that is integral with it; 4. The sleeve-type tubing consists of two parts, with an outward rectangular ring integrally formed at the bottom of both the upper and lower sleeve-type tubing. 5. The thickness of the axial support of the two sleeves arranged vertically within the circumferential groove increases from top to bottom; 6. The deformable ball sleeve (2) can be connected by multiple pipe segments; 7. A protective cylinder is provided between the positioning sleeve and the deformable ball sleeve.

[0006] Compared with the prior art, the anchor cable gradient yielding damper provided by this utility model has the following advantages: First, since the structure of the yielding damper includes at least one sleeve-type tube sleeve with an outward rectangular ring, the yielding damper has the advantages of compact structure, safe use, and economic durability. Second, since the yielding damper consists of a positioning sleeve with a sleeve, a deformable ball sleeve with a socket connection at the lower end of the sleeve, and at least one annular deformable sleeve with a stress point on the sleeve between the two, the yielding damper has the advantages of compact structure, safe use, economic durability, and economic durability. Firstly, during use, when the tensile stress of the anchor cable passing through the sleeve of the pressure damper increases, the annular deformation sleeve and the deformation ball sleeve constituting the pressure damper will deform sequentially, thus releasing the pressure between the anchor cable and the supported rock (coal) layer in a sequential manner. This can effectively prevent the anchor cable from breaking and causing the support to fail. Secondly, because a sleeve-type tube is set in the annular groove, and the upper and lower annular structures of the sleeve-type tube are the same, when the sleeve-type tube directly breaks through it axially, it will not cause the entire anchor cable gradient pressure damper to become unstable. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of an anchor cable gradient pressure damper according to the present invention; Figure 2 A schematic diagram of the second type of anchor cable gradient pressure damper; Figure 3 A schematic diagram of the third type of anchor cable gradient pressure damper; Figure 4 A schematic diagram of the fourth type of anchor cable gradient pressure damper; Figure 5 A schematic diagram of the fifth type of anchor cable gradient compression damper. Figure 6 This is a schematic diagram of the sixth type of anchor cable gradient pressure damper. Detailed Implementation

[0008] The structure and working principle of the anchor cable gradient pressure damper provided by this utility model will be further described in detail below with reference to the accompanying drawings.

[0009] like Figure 1 The diagram shows a structural schematic of an anchor cable gradient pressure damper. Its structure includes a positioning sleeve 1 that can be fitted onto the end of the anchor cable 4. The positioning sleeve 1 consists of a positioning ring 11 and a sleeve 12 integrally formed therewith. A deformable ball sleeve 2 capable of receiving and extending is fitted onto the lower part of the sleeve 12 constituting the positioning sleeve, and an circumferential groove is formed between the upper end of the deformable ball sleeve 2 and the positioning ring 11 constituting the positioning sleeve. Upper and lower annular deformable sleeves 31 and 32 are vertically stacked within this circumferential groove, with their axial sections interlocking. To prevent the lower support vertical ring 320 from pressing against the upper radial support ring 311, causing both to bulge and crack, a protective outer sleeve mechanism is provided from the upper part of the positioning ring 11 to the lower part of the deformable ball sleeve 2, comprising upper and lower protective outer sleeves 71 and 72 (with a possible connecting mechanism 73 in the middle). Of course, in the above structure, the thickness of the lower support vertical ring 320 can be greater than the thickness of the upper support vertical ring 310, so that when the two are squeezed, due to the pressure of the lower support vertical ring 320 on the upper radial support ring 311, the upper support vertical ring 310 of the upper annular deformable sleeve 31 is deformed, forming a flattened annular ring.

[0010] In use, the gradient pressure damper of the above structure is fitted onto the end of the anchor cable 4. Specifically, an upper support plate 41 and a lower support plate 42 are installed outside the precast rock hole 5 where the anchor cable 4 is fixed, with the gradient pressure damper and upper and lower protective jackets 71 and 72 sandwiched between them. The anchor cable 4 passes through the upper and lower support plates 41 and 42, the gradient pressure damper, and the upper and lower protective jackets 71 and 72, and is then secured with a locking device 43.

[0011] When the rock (coal) stratum 6 where the anchor cable 4 is fixed deforms, the axial tension of the anchor cable 4 increases excessively. Its upper and lower annular deformation sleeves 31 and 32, as well as the deformation ball sleeve 2, are compressed and deformed by the upper support plate 41 supported by the pre-drilled hole 5 in the rock mass and the lower support plate 42 supported by the lock 43 (of course, the thickness of the lower support vertical ring 320 constituting the upper and lower annular deformation sleeves 31 and 32 is greater than the thickness of the upper support vertical ring 311). Therefore, the upper support vertical ring 310 of the upper annular deformation sleeve 31 is compressed into a flattened annular ring. The deformation ball sleeve 2, inserted into the positioning sleeve 12, pushes the lower annular deformation sleeve 32 upwards under the axial tension of the anchor cable, compressing and flattening the upper annular deformation sleeve 31. The tension of the anchor cable is effectively released, achieving the first reduction in anchor cable tension. When the rock (coal) stratum 6 deforms further, the anchor cable is tightened again, and its axial tension... When the tension increases excessively, the lower annular deformable sleeve 32 is compressed again by the flattened upper annular deformable sleeve 31, the deformable ball sleeve 2, and the lower support plate 42, forming a flattened lower annular deformable sleeve 32. The deformable ball sleeve 2, which is inserted into the positioning sleeve 12, directly presses against the flattened lower annular deformable sleeve 32 under the axial tension of the anchor cable, and the tension of the anchor cable is effectively released for the second time, achieving a second reduction in anchor cable tension. When the rock (coal) layer 6 further deforms, the anchor cable is tightened again, and the axial tension of the anchor cable increases excessively. The deformable ball sleeve 2 is compressed by the flattened lower annular deformable sleeve 32 and the lower support plate 42, causing its spherical surface to expand and deform. This causes the gradient pressure damper to continue to shorten in its axial direction, effectively releasing the tension of the anchor cable for the third time, reducing the anchor cable tension, and achieving a third prevention of its breakage.

[0012] Obviously, the anchor cable equipped with the gradient pressure damper will deform in the rock (coal) layer 6, causing the anchor cable to release the anchor cable tension in stages due to the sequential flattening or deformation of the upper and lower annular deformation sleeves and deformation ball sleeves 2 that constitute the gradient pressure damper. This can effectively prevent the occurrence of its breakage and ensure the safety of the roadway supported by the anchor cable.

[0013] It should be noted that the sleeve 12 constituting the positioning sleeve 1 and the deformable ball sleeve 2 are connected by a socket. When the two are prefabricated, the socket part at the port has a certain locking pressure to ensure that the expansion and contraction will not occur immediately when the pressure damper is compressed.

[0014] In the structure constituting the above-mentioned novel anchor cable pressure damper 1. For example Figure 2 or Figure 3 As shown, to prevent damage to the sleeve-type tubing 31 or 32, an outward rectangular ring 312 or 322 integrally formed with it is provided at the lower part of the sleeve-type tubing 31 or 32, forming an "inverted L" shape; wherein, as Figure 3The sleeve-type sleeve used consists of two parts, 31 and 32, with an outward rectangular ring 322 positioned on the lower sleeve-type sleeve 32; of course, it can also be as follows: Figure 3 As shown, the outer rectangular ring 312 is set at the lower part of the upper sleeve-type sleeve 31; 2. For example Figure 4 As shown, the outer rectangular rings 312 and 322 are set at the lower part of the upper and lower ring-shaped deformable sleeves 31 and 32, forming two parallel supporting vertical rings 312 and 322. After being squeezed, they can form a flattened ring structure, so that the anchor cable releases the tension force to achieve the purpose of this utility model. 3. Of course, such as Figure 5 As shown, the sleeve-type sleeve 31 used is a piece. The thickness of the sleeve 31 gradually increases from top to bottom (of course, it can also become thinner, and its thickness can remain unchanged). A supporting vertical ring 311 is provided in the middle, which can also achieve the purpose of this utility model. 4. In the above-mentioned pressure damper structure, the deformable ball sleeve 2 can be either a variable sleeve or as shown in the figure. Figure 6 The two variant sleeves 21 and 22 are shown; of course, these two variant sleeves can still be connected together.

Claims

1. An anchor cable gradient pressure damper, comprising a positioning sleeve (1) capable of being fitted onto the end of an anchor cable (4), the positioning sleeve being composed of a positioning ring (11) and a sleeve (12) integrally formed therewith; a deformable ball sleeve (2) is fitted onto the lower part of the sleeve (12) constituting the positioning sleeve, the deformable ball sleeve (2) being inserted and extended with the sleeve (12) and forming an circumferential groove with the positioning ring (11) constituting the positioning sleeve; a protective outer sleeve mechanism comprising upper and lower protective outer sleeves (71, 72) is provided from the upper part of the positioning ring (11) to the lower part of the deformable ball sleeve (2); characterized in that: At least one sleeve-type tube is provided in the circumferential groove.

2. The anchor cable gradient pressure damper according to claim 1, characterized in that: The number of sleeve-type sleeves is one, and an outward rectangular ring integrally formed with the sleeve is provided in the middle of the sleeve.

3. The anchor cable gradient pressure damper according to claim 2, characterized in that: The sleeve is progressively thicker from top to bottom.

4. The anchor cable gradient pressure damper according to claim 1, characterized in that: There are two or more sleeve-type tubes, and the bottom of the upper or lower sleeve-type tube is provided with an outward rectangular ring that is integral with it.

5. The anchor cable gradient pressure damper according to claim 1, characterized in that: The sleeve-type tubing consists of two parts, with an outward rectangular ring integrally formed at the bottom of both the upper and lower sleeve-type tubing.

6. The anchor cable gradient pressure damper according to claim 1, characterized in that: The thickness of the axial support of the two sleeves arranged vertically within the circumferential groove increases sequentially from top to bottom.

7. The anchor cable gradient pressure damper according to claim 1, characterized in that: The deformable ball sleeve (2) can be connected to multiple pipe segments.

8. The anchor cable gradient pressure damper according to claim 1, characterized in that: A protective cylinder is provided between the positioning sleeve and the deformable ball sleeve.

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