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CN-121593838-B - Buffering and reinforcing device for high-temperature burst impact of resin anchor rod

CN121593838BCN 121593838 BCN121593838 BCN 121593838BCN-121593838-B

Abstract

The invention belongs to the technical field of anchor rod equipment. In order to solve the problem that the resin anchoring agent takes place the pyrolysis under high temperature and leads to drilling explosion, anchor inefficacy, a buffering reinforcing apparatus of resin stock high temperature burst impact is provided, including the stock, one-level relief mechanism, second grade buffer gear and tertiary reinforcing mechanism, the both ends of stock are equipped with stop nut and tray respectively to overlap, inside one-level relief mechanism that is provided with including pressure release passageway and a plurality of pressure release holes, the inside hollow structure of stock is in order to form pressure release passageway, a plurality of pressure release holes evenly distributed is in the second end of stock, second grade buffer gear is including the damping spring and the first bradyseism packing ring of cover on the stock, first bradyseism packing ring is located between damping spring and the tray, tertiary reinforcing mechanism is including setting up in the anchor net of coal wall surface, hollow disc and the hawser of connecting anchor net and hollow disc, hollow disc cover is located on the stock, be located between stop nut and the damping spring. The device realizes gradual digestion of energy through grading treatment.

Inventors

  • YAO MANLI
  • WANG XIANGYU
  • SU LEI
  • DU XIANJIE

Assignees

  • 太原理工大学

Dates

Publication Date
20260508
Application Date
20260129

Claims (7)

  1. 1. The utility model provides a buffering reinforcing apparatus of resin stock high temperature burst impact which characterized in that includes: The novel pressure relief device comprises an anchor rod (1), wherein a limit nut (2) is sleeved on the upper part of the anchor rod (1), a tray (8) is sleeved on the middle lower part of the anchor rod (1), a primary pressure relief mechanism is arranged in the anchor rod (1) and comprises a pressure relief channel (12) and a plurality of pressure relief holes (13), the interior of the anchor rod (1) is of a hollow structure to form the pressure relief channel (12), the pressure relief holes (13) are uniformly distributed on the lower part of the anchor rod (1), all the pressure relief holes (13) are vertically communicated with the pressure relief channel (12), the diameter of the pressure relief holes (13) is 2.5mm, the diameter of the pressure relief channel (12) is 8mm, and the ratio of the cross section area of the pressure relief channel (12) to the total flow area of all the pressure relief holes (13) is 1.2:1-1.5:1; The second-level buffer mechanism comprises a damping spring (6) and a first buffer gasket (3), the damping spring (6) and the first buffer gasket (3) are sleeved on the anchor rod (1), the first buffer gasket (3) is positioned between the damping spring (6) and the tray (8), the lower end of the damping spring (6) is attached to the first buffer gasket (3), the inner diameter of the damping spring (6) is 1-2mm larger than the diameter of the anchor rod (1), the length of the damping spring (6) in an uncompressed state is 80-120mm, and the rigidity of the damping spring (6) is 2.0-3.0kN/mm; The second-level buffer mechanism further comprises a second buffer gasket (15), a third buffer gasket (16), a first metal gasket (4) and a second metal gasket (17) which are sleeved on the anchor rod (1), wherein the first metal gasket (4) is arranged between the buffer spring (6) and the first buffer gasket (3), the second metal gasket (17) is arranged at the upper end of the buffer spring (6), the second buffer gasket (15) is arranged between the second metal gasket (17) and the hollow disc (5), and the third buffer gasket (16) is arranged between the hollow disc (5) and the limit nut (2); the three-stage reinforcing mechanism comprises an anchor net (14), a cable (9) and a hollow disc (5), wherein the anchor net (14) is arranged on the surface of a coal wall, the hollow disc (5) is sleeved on the anchor rod (1) and is positioned between the limit nut (2) and the damping spring (6), and the cable (9) is connected with the anchor net (14) and the hollow disc (5).
  2. 2. The buffering and reinforcing device for high-temperature bursting impact of a resin anchor rod according to claim 1, wherein the inner diameters of the first buffering washer (3), the second buffering washer (15), the third buffering washer (16), the first metal washer (4) and the second metal washer (17) are the same, the outer diameters of the first buffering washer (3), the second buffering washer (15) and the third buffering washer (16) are 5-10mm larger than the outer diameters of the first metal washer (4) and the second metal washer (17), and the outer diameters of the first metal washer (4) and the second metal washer (17) are larger than the outer diameter of the damping spring (6).
  3. 3. The buffering and reinforcing device for high-temperature bursting impact of the resin anchor rod according to claim 1, wherein the hollow disc (5) comprises an upper disc (18) and a lower disc (19) which are arranged at intervals along the axial direction of the anchor rod (1), through holes for the anchor rod (1) to penetrate are formed in the middle positions of the upper disc (18) and the lower disc (19), two containing grooves (20) are formed in the opposite sides of the upper disc (18) and the lower disc (19), the two containing grooves (20) which are positioned in the same plane are parallel and symmetrically arranged relative to the axial direction of the anchor rod (1), two ends of each of the four containing grooves (20) penetrate through the circumferential side wall of the corresponding upper disc (18) or lower disc (19), and a cable (9) penetrates through the containing grooves (20) along the penetrating direction of the containing grooves (20); The width of the accommodating groove (20) is the same as the diameter of the cable (9), and the depth of the accommodating groove (20) is 0.4-0.6 times of the diameter of the cable (9).
  4. 4. A resin anchor rod high temperature burst impact buffering and reinforcing device according to claim 3, characterized in that the upper disc (18) and the lower disc (19) are symmetrically provided with through grooves (11), and temperature sensors are arranged in the through grooves (11) and used for detecting the temperature in the drilling holes of the anchor rod (1).
  5. 5. A resin anchor rod high temperature burst impact buffering and reinforcing device according to claim 1, characterized in that the included angle between the cable (9) and the anchor rod (1) is less than or equal to 30 °.
  6. 6. A device for buffering and reinforcing high-temperature burst impact of a resin anchor rod according to claim 1, wherein the three-stage reinforcing mechanism further comprises a lock catch (10), the lock catch (10) comprises a shell and a lock piece, the lock piece is arranged in the shell, and a cable (9) passes through a gap of the lock piece and is locked by a bolt.
  7. 7. The buffering and reinforcing device for high-temperature burst impact of the resin anchor rod according to claim 1, wherein a fastening nut (7) is arranged between the first cushioning gasket (3) and the tray (8); the thickness of the limit nut (2) is 1.2-1.5 times of the thickness of the fastening nut (7).

Description

Buffering and reinforcing device for high-temperature burst impact of resin anchor rod Technical Field The invention belongs to the technical field of anchor rod equipment, and particularly relates to a buffering and reinforcing device for high-temperature bursting impact of a resin anchor rod. Background The anchor rod and anchor cable support is the most main roadway support technology of coal mines in China at present, and the resin composite anchoring material is fast in gelation, high in strength and stable in performance, and is widely applied to reinforcement of geotechnical engineering such as coal mine tunnels, mountain tunnels and building structures. The resin anchoring material for coal mine is prepared by mixing unsaturated polyester resin, calcium carbonate powder and curing agent, belongs to organic polymer composite materials, but is possibly insufficient in anchoring due to improper manual operation, insufficient stirring of the anchoring agent, stress, mine water corrosion and the like, so that the anchoring performance is affected, meanwhile, the unsaturated polyester resin is pyrolyzed after reaching a certain temperature, quickly decomposed after reaching a high temperature of 350 ℃, a large amount of gas is generated, the unsaturated polyester resin cannot permeate in a sealed anchor rod drilling hole, and energy is totally accumulated at a pipe orifice and is exploded out from the pipe orifice after reaching a certain pressure, so that the anchoring material is damaged, and the safety of an engineering structure is greatly affected. When gas explosion occurs in a coal mine and fire breaks out on the ground or in a building, the temperature of the structural body can reach 500-800 ℃, at the temperature, the resin anchoring material can be pyrolyzed, the anchoring is invalid, the drilling hole is exploded, the anchor rod body is ejected outwards due to pyrolysis expansion of the resin anchoring material in the drilling hole, and great hidden danger is brought to the stability and safety of an engineering structure. The existing buffer device adopts a single mechanical buffer mode, energy accumulation is not reduced by pressure relief, and the buffer efficiency is limited, so that a multistage device for pressure relief before buffer is needed, partial energy is discharged firstly when burst occurs, and residual kinetic energy is absorbed by a mechanical structure, and a secondary reinforcement effect is achieved. Disclosure of Invention In order to solve the technical problems, the invention provides a buffering and reinforcing device for high-temperature bursting impact of a resin anchor rod, which can be used for gradually absorbing bursting energy in a multistage and cooperated manner. The invention provides a buffering and reinforcing device for high-temperature burst impact of a resin anchor rod, which comprises the following components: The upper part of the anchor rod is sleeved with a limit nut, the middle lower part of the anchor rod is sleeved with a tray, a primary pressure relief mechanism is arranged in the anchor rod and comprises a pressure relief channel and a plurality of pressure relief holes, the inside of the anchor rod is of a hollow structure so as to form the pressure relief channel, and the pressure relief holes are uniformly distributed at the lower part of the anchor rod; the second-level buffer mechanism comprises a damping spring and a first damping washer, the damping spring and the first damping washer are sleeved on the anchor rod, and the first damping washer is positioned between the damping spring and the tray; The three-stage reinforcing mechanism comprises an anchor net, a cable and a hollow disc, wherein the anchor net is arranged on the surface of the coal wall, the hollow disc is sleeved on the anchor rod and is positioned between the limit nut and the damping spring, and the cable is connected with the anchor net and the hollow disc. Optionally, all the pressure relief holes are vertically communicated with the pressure relief channel, the diameter of the pressure relief holes is 2.5mm, and the diameter of the pressure relief channel is 8mm; The ratio of the cross-sectional area of the pressure relief channel to the total flow area of all pressure relief holes is in the range of 1.2:1-1.5:1. Optionally, the lower end of the damping spring is attached to the first damping washer, the inner diameter of the damping spring is 1-2mm larger than the diameter of the anchor rod, the value range of the length of the damping spring in an uncompressed state is 80-120mm, and the value range of the rigidity of the damping spring is 2.0-3.0kN/mm. Optionally, the second-level buffer mechanism further comprises a second buffer gasket, a third buffer gasket, a first metal gasket and a second metal gasket which are sleeved on the anchor rod; The first metal gasket is arranged between the damping spring and the first damping gasket, the second metal gasket is arrang