Novel energy-absorbing anti-impact anchorage device assembly for anchoring steel strand

Abstract

The utility model relates to a novel energy-absorbing anti-impact anchorage device assembly for anchoring a steel strand. The novel energy-absorbing anti-impact anchorage device assembly comprises a base plate, a self-aligning cushion cover, an anchor ring and a clamping piece, the base plate is in an inverted cone shape; a through hole is formed in the center of the self-aligning cushion cover in an up-down penetrating mode, the side face of the upper end of the outer wall of the self-aligning cushion cover is designed to be an arc-shaped annular face, and the lower end of the outer wall of the self-aligning cushion cover is cylindrical; the part, above the arc-shaped supporting table, of the anchor ring is matched with the center through hole of the center adjusting cushion cover. During use, the part, above the arc-shaped supporting table, of the anchor ring is inserted into the center through hole of the self-aligning cushion cover from bottom to top. The novel energy-absorbing anti-impact anchorage device assembly for anchoring the steel strand is simple in structure, does not contain an anchor ring cover, and is easy to connect and install due to the fact that the anchor ring and the aligning pad are connected in an inserted mode; and the energy absorption and impact resistance are high.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine support, in particular to a new type of energy-absorbing and impact-resistant anchor component for anchoring steel strands. Background Art

[0002] Coal mining tunnels need to be supported by anchor cables. Ordinary anchor cables are composed of steel strands, anchor assemblies, and trays. During construction, holes are first drilled on the coal seam (or rock layer), and resin anchors are first fed into the drilled holes. The steel strands are then mixed and bonded with the resin anchors. The lower end of the steel strands is supported by a tray and the anchor is sleeved on the steel strands, close to the coal seam. Finally, the steel strands are tensioned and the clip anchors are used to anchor the steel strands to complete the support function of the anchor cables.

[0003] However, during the coal mining process, coal seam dislocation and ground pressure changes may occur at any time. In many cases, the anchor cable is subjected to sudden impact loads. When the instantaneous ground pressure impact force with a strength higher than the breaking force of the anchor cable is generated, the anchor cable has no time to slowly extend. At this time, the anchor cable will be directly broken or the anchor will slip, resulting in anchor failure, anchor cracking, biting off the steel strand, and anchor collapse, causing the anchoring force of the anchor cable to be lost, posing a huge safety hazard to the coal mine.

[0004] How to develop a mining energy-absorbing and impact-resistant anchor assembly that is impact-resistant and adaptable to high ground pressure and large deformation, and its installation method, is a technical problem that needs to be solved urgently by those skilled in the art.

[0005] The patent application number previously applied by the applicant is 202210202461.1, an energy-absorbing and impact-resistant anchor assembly and its installation method, which relates to an energy-absorbing and impact-resistant anchor assembly, including: a pad, an energy-absorbing and impact-resistant centering pad, an energy-absorbing and impact-resistant anchor ring and a clip; the energy-absorbing and impact-resistant anchor ring is sleeved on the steel strand, and an external thread is formed on its outer wall; the upper end of the energy-absorbing and impact-resistant anchor ring is threadedly connected to the energy-absorbing and impact-resistant centering pad, and an internal threaded through hole compatible with the external thread is axially formed in the energy-absorbing and impact-resistant centering pad. The problems with this application are: it contains an anchor ring cover, and the external thread of the anchor ring is threadedly connected to the centering pad, which has a complex structure, complex thread processing and great difficulty in connection and installation, and the thread is easy to slip if it is not connected properly, and is very easy to be damaged; the impact resistance is poor. To this end, a new energy-absorbing and impact-resistant anchor assembly for anchoring steel strands is designed to solve the above problems. Summary of the invention

[0006] In order to overcome the above shortcomings, the utility model provides a new type of energy-absorbing and impact-resistant anchor assembly for anchoring steel strands, including a pad, a self-aligning pad sleeve, an anchor ring and a clip;

[0007] The pad is in the shape of an inverted cone;

[0008] The center of the self-aligning sleeve is provided with a through hole from top to bottom, the upper side surface of the outer wall of the self-aligning sleeve is designed as an arc-shaped annular surface, and the lower end of the outer wall of the self-aligning sleeve is designed as a cylindrical shape;

[0009] The anchor ring is provided with a central inner hole, and the outer side wall of the anchor ring is designed in a stepped manner. The first step from top to bottom is an arc-shaped support platform, and the second step is a right-angle support platform, which plays a role of safe clamping;

[0010] The upper part of the arc-shaped support platform of the anchor ring is adapted to the central through hole of the self-aligning sleeve; when in use, the upper part of the arc-shaped support platform of the anchor ring is inserted into the central through hole of the self-aligning sleeve from bottom to top; the arc-shaped support platform of the anchor ring plays a supporting role and can support the self-aligning sleeve when the steel strand does not experience a large impact;

[0011] The length of the central through hole of the self-aligning cushion sleeve is longer than the part above the arc-shaped support platform of the anchor ring; when a large impact occurs to the steel strand, the upper part of the anchor ring can be displaced upward in the central through hole in the self-aligning cushion sleeve to absorb a large part of the impact energy; that is, the arc-shaped support platform of the anchor ring is deformed and rushes into the central through hole in the self-aligning cushion sleeve;

[0012] The clip is detachably mounted in the central inner hole of the anchor ring; the central inner hole of the anchor ring is formed into a conical surface, which is matched with the shape of the outer end surface of the clip; the clip is used to clamp the steel strand.

[0013] Preferably, the length of the central through hole of the self-aligning cushion sleeve is equal to the portion above the second step of the anchor ring.

[0014] Preferably, the clip is a three-part clip or a four-part clip.

[0015] Preferably, the pad is a conical or flat pad.

[0016] Preferably, the four-section clip is in the shape of a cone, and includes two clips arranged opposite to each other, and an elastic groove is formed in the middle of each clip.

[0017] Preferably, the anchor ring has a tempering hardness of 32-36HRG.

[0018] Preferably, the surface of the anchor ring is coated with molybdenum disulfide lubricating oil.

[0019] Preferably, the inner diameter of one end of the anchor ring is 52±0.1 mm, the inner diameter of the other end of the anchor ring is 33±0.1 mm, the length of the anchor ring is 90±0.5 mm, and the arc radius of the arc-shaped support platform of the anchor ring is 10 mm.

[0020] The beneficial effects of the utility model are:

[0021] The utility model discloses a novel energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand, which has a simple structure, does not contain an anchor ring cover, and is easy to connect and install by plugging the anchor ring and the centering pad. It has a strong energy-absorbing and impact-resistant capability, and increases the impact resistance by 40 percent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the utility model (after installation);

[0023] Figure 2 It is a three-dimensional diagram of the utility model (after installation);

[0024] Figure 3 It is a three-dimensional picture of the centering pad;

[0025] Figure 4 A three-dimensional diagram of an anchor ring;

[0026] Figure 5 is a three-dimensional diagram of the clip;

[0027] Figure 6 The dimension drawing for making anchor ring;

[0028] Figure 7 This is the production dimension drawing of the self-aligning pad;

[0029] in:

[0030] 1- pad; 2- centering pad; 3- anchor ring; 4- clip; 5- steel strand; 31- arc support platform. DETAILED DESCRIPTION

[0031] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings.

[0032] Example

[0033] A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand, comprising a pad 1, a self-aligning cushion sleeve 2, an anchor ring 3 and a clip 4;

[0034] The pad 1 is in the shape of an inverted cone;

[0035] The center of the self-aligning sleeve 2 is provided with a through hole from top to bottom, the upper side surface of the outer wall of the self-aligning sleeve 2 is designed as an arc-shaped ring surface, and the lower end of the outer wall of the self-aligning sleeve 2 is provided as a cylindrical shape;

[0036] The anchor ring 3 is provided with a central inner hole, and the outer wall of the anchor ring 3 is designed in a stepped manner. The first step from top to bottom is an arc-shaped support platform 31, and the second step is a right-angle support platform, which plays a role of safe clamping;

[0037] The portion above the arc-shaped support platform 31 of the anchor ring 3 is adapted to the central through hole of the self-aligning sleeve 2; when in use, the portion above the arc-shaped support platform 31 of the anchor ring 3 is inserted from bottom to top into the central through hole of the self-aligning sleeve 2; the arc-shaped support platform 31 of the anchor ring 3 plays a supporting role, and can support the self-aligning sleeve 2 when the steel strand does not experience a large impact;

[0038] The length of the central through hole of the self-aligning cushion sleeve 2 is longer than the part above the arc-shaped support platform 31 of the anchor ring 3; when a large impact occurs to the steel strand, the upper part of the anchor ring 3 can be displaced upward in the central through hole in the self-aligning cushion sleeve 2 to absorb a large part of the impact energy; that is, the arc-shaped support platform 31 of the anchor ring 3 is deformed and rushes into the central through hole in the self-aligning cushion sleeve 2;

[0039] The clip 4 is detachably mounted in the central inner hole of the anchor ring 3; the central inner hole of the anchor ring 3 is formed into a conical surface, which is adapted to the shape of the outer end surface of the clip 4; the clip 4 is used to clamp the steel strand.

[0040] Preferably, the length of the central through hole of the self-aligning cushion sleeve 2 is equal to the portion above the second step of the anchor ring 3 .

[0041] Preferably, the clip 4 is a three-part clip or a four-part clip.

[0042] Preferably, the pad 1 is a conical or flat pad.

[0043] Preferably, the four-section clip is in the shape of a cone, and includes two clips arranged opposite to each other, and an elastic groove is formed in the middle of each clip.

[0044] Preferably, the inner diameter of one end of the anchor ring 3 is 52±0.1 mm, the inner diameter of the other end of the anchor ring 3 is 33±0.1 mm, the length of the anchor ring 3 is 90±0.5 mm, and the arc radius of the arc support platform of the anchor ring is 10 mm.

[0045] Installation method:

[0046] The installation of a new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand comprises the following steps:

[0047] Step 1, install the pad 1: pass the pad 1 through the steel strand 5 and fit it to the pressure-bearing surface;

[0048] Moreover, before step 1, the method further includes the following steps:

[0049] Check whether all parts of a new energy-absorbing and impact-resistant anchor assembly for steel strand anchoring are complete, matched, and damaged, whether it can be smoothly screwed into the energy-absorbing and impact-resistant self-aligning pad, check whether the tensioning equipment is matched, and ensure that the equipment is in good condition.

[0050] Step 2, installing the anchor ring 3 and the centering pad 2: insert the anchor ring 3 into the centering pad 2, the arc-shaped support platform 31 of the anchor ring 3 plays the role of supporting the centering pad 2, put the clip 4 into the anchor ring 3, and then install the assembled anchor on the steel strand 5; the steel strand 5 extends into the reserved channel made on the side wall of the mine;

[0051] Step 3, tensioning: use the supporting tensioning equipment to prestress the steel strand 5, and remove the tensioning jack after tensioning to the preset tension;

[0052] Step 4: Observe whether the clip follow-up of the energy-absorbing and impact-resistant anchor assembly is abnormal;

[0053] When a big shock occurs:

[0054] When high ground pressure (mine pressure) suddenly comes, the coal seam suddenly moves down, and the impact energy acts on the pad 1, which undergoes elastic-plastic deformation and absorbs a small part of the impact energy; the pad 1 transmits the force to the centering pad 2, and the upper part of the anchor ring 3 and the connection part of the centering pad 2 will produce a large extrusion deformation, and the upper middle part of the anchor ring 3 will be displaced toward the central through hole of the centering pad 2, absorbing a large part of the impact energy;

[0055] The anchor ring 3 and the clip 4 transfer the impact load to the steel strand 5, and the steel strand 5 produces a certain amount of elongation and absorbs part of the impact energy; the clip 3 and the anchor ring 3 produce a small amount of displacement and absorb a small part of the impact energy.

[0056] The test was carried out at Hujiahe Coal Mine and the effect was obvious.

[0057]

[0058] When the hammer mass, impact height, impact energy and initial velocity are the same, the energy-absorbing and impact-resistant anchor of the present application absorbs 14387.32 J of energy, which is more than 4300 joules lower than that of the traditional anchor, has a lower terminal velocity, a smaller CH1 FMax, and a longer impact displacement.

[0059] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand, comprising a backing plate (1), a self-aligning sleeve (2), an anchor ring (3) and a clip (4); The pad (1) is in the shape of an inverted cone; It is characterized in that The center of the self-aligning sleeve (2) is provided with a through hole extending therethrough from top to bottom, the side surface of the upper end of the outer wall of the self-aligning sleeve (2) is designed as an arc-shaped annular surface, and the lower end of the outer wall of the self-aligning sleeve (2) is designed as a cylindrical shape; The anchor ring (3) is provided with a central inner hole, and the outer wall of the anchor ring (3) is designed in a stepped manner. The first step from top to bottom is an arc-shaped support platform (31), and the second step is a right-angle support platform, which plays a role of safe clamping; The portion above the arc-shaped support platform (31) of the anchor ring (3) is adapted to the central through hole of the self-aligning sleeve (2); when in use, the portion above the arc-shaped support platform (31) of the anchor ring (3) is inserted from bottom to top into the central through hole of the self-aligning sleeve (2); the arc-shaped support platform (31) of the anchor ring (3) plays a supporting role and can support the self-aligning sleeve (2) when the steel strand does not experience a large impact; The length of the central through hole of the self-aligning sleeve (2) is longer than the portion above the arc-shaped support platform (31) of the anchor ring (3); when a large impact occurs to the steel strand, the upper portion of the anchor ring (3) can be displaced upward in the central through hole in the self-aligning sleeve (2) to absorb a large portion of the impact energy; that is, the arc-shaped support platform (31) of the anchor ring (3) is deformed and rushes into the central through hole in the self-aligning sleeve (2); The clamp (4) is detachably mounted in the central inner hole of the anchor ring (3); the central inner hole of the anchor ring (3) is formed into a conical surface, and the conical surface is adapted to the shape of the outer end surface of the clamp (4); the clamp (4) is used to clamp the steel strand.

2. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand according to claim 1, characterized in that: The length of the central through hole of the self-aligning cushion sleeve (2) is equal to the portion above the second step of the anchor ring (3).

3. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand according to claim 2, characterized in that: The clamping piece (4) is a three-part clamping piece or a four-part clamping piece.

4. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand according to claim 3, characterized in that: The pad (1) is a tapered or flat pad.

5. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring steel strands according to claim 4 or 3, characterized in that: The four-section clip is in the shape of a cone and comprises two clips arranged opposite to each other. An elastic groove is formed in the middle of each clip.

6. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring steel strands according to claim 5, characterized in that: The surface of the anchor ring (3) is coated with molybdenum disulfide lubricating oil.

7. A new type of energy-absorbing and impact-resistant anchor assembly for anchoring a steel strand according to claim 6, characterized in that: The inner diameter of one end of the anchor ring (3) is 52±0.1 mm, the inner diameter of the other end of the anchor ring (3) is 33±0.1 mm, the length of the anchor ring (3) is 90±0.5 mm, and the arc radius of the arc support platform of the anchor ring (3) is 10 mm.

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