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CN-122009934-A - Anti-falling buffer system of construction elevator

CN122009934ACN 122009934 ACN122009934 ACN 122009934ACN-122009934-A

Abstract

The invention discloses a fall-preventing buffer system of a construction elevator, which is applied to the related technical field of elevators, and provides a key second safety line for abnormal falling of a suspension cage by adding a mechanical multistage buffer energy consumption unit on an upright post of the elevator, and the fall-preventing buffer system is characterized in that a plurality of reverse suppressors can sequentially consume energy through compression of a rubber sheet and bending fracture of a guide rod even when power is off without depending on electric power, and continuously absorb falling energy, so that the final falling speed and impact force of the suspension cage are obviously reduced; meanwhile, aiming at the transient secondary acceleration problem possibly occurring when the reverse inhibitor is separated from the upright post and the suspension cage is instantaneously, the secondary acceleration inhibition unit is additionally arranged, so that the secondary acceleration amplitude generated by the suspension cage can be effectively inhibited when a certain reverse inhibitor is separated from the I-shaped upright post, the whole buffering and speed-reducing process is more continuous and smooth, obvious pause and frustration is reduced, and the impact on personnel in the suspension cage is reduced.

Inventors

  • XUE WEI
  • XI GUIJI
  • WANG BAOXU
  • DING XINGLONG
  • LIU JUNCHEN

Assignees

  • 中杰建兆(江苏)智能电梯有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (9)

  1. 1. The anti-falling buffer system of the construction elevator comprises a controller arranged on the elevator, a speed sensor arranged on a lifting cage of the elevator, a band-type brake system arranged on a lifting wheel of the lifting cage and a multi-stage buffer energy consumption unit arranged on an I-shaped upright post of the elevator, and is characterized in that the multi-stage buffer energy consumption unit comprises a plurality of reverse suppressors (1) arranged on the end part of the I-shaped upright post close to one side of the lifting cage, the reverse suppressors (1) comprise a step-shaped backboard (11) and a trapezoid stop block (12) connected to the middle part of the step-shaped backboard (11) through a rotating shaft (13) and a torsion spring, an electromagnetic plate (14) is fixedly arranged on the end surface of the upper half part of the step-shaped backboard (11) close to the trapezoid stop block (12), the power on/off of the electromagnetic plate (14) is controlled by the controller, the left inner wall and the right inner wall of the I-shaped upright post are fixedly connected with vertical guide rails (203), and two ends of the rotating shaft (13) are respectively connected with two vertical guide rails (203) in a sliding mode; the novel structure is characterized in that a plurality of guide rods (21) are fixedly connected to the back of the step-shaped backboard (11), a plurality of groups of guide grooves (201) which are respectively and correspondingly arranged with a plurality of reverse suppressors (1) are cut on the I-shaped upright column, the number of the guide grooves (201) is consistent with the number of the guide rods (21) on the corresponding reverse suppressors (1), the guide rods (21) movably penetrate through the guide grooves (201) and are fixedly connected with fastening nuts (202), rubber sheets (22) are fixedly connected to the bottoms of the guide grooves (201), and the guide rods (21) are in contact with the rubber sheets (22).
  2. 2. The anti-falling buffer system for the construction elevator according to claim 1, wherein the rubber sheet (22) is made of high-toughness materials, the edges of the upper end and the lower end of the guide groove (201) are semicircular, the middle part of the guide groove is rectangular, a gap is reserved right below the joint of the guide rod (21) and the step-shaped backboard (11), and the depth of the gap is not more than 2/3 of the diameter of the guide rod (21).
  3. 3. The anti-falling buffer system for the construction elevator is characterized in that a lower pressure sensor (103) and an upper pressure sensor (102) are respectively arranged at one ends of the stepped back plate (11) and the electromagnetic plate (14) far away from the I-shaped upright post, the upper pressure sensor (102) is positioned above the lower pressure sensor (103), the upper pressure sensor (102) and the lower pressure sensor (103) respectively correspond to the middle parts of the long right-angle end and the short right-angle end of the trapezoidal check block (12), and a rubber gasket (101) is fixedly attached to the outer end of the trapezoidal check block (12) close to the upper half part of the stepped back plate (11).
  4. 4. The fall protection buffer system for the construction elevator according to claim 3, wherein the trapezoid block (12) is inclined when not subjected to external force, an included angle between the trapezoid block (12) and the upper half part of the stepped backboard (11) is 30-60 degrees, the trapezoid block (12) is not contacted with a vertically moving cage when in a vertical state, and the length of the trapezoid block (12) which coincides with the top view angle of the cage is not less than half of the length of the trapezoid block (12) when the trapezoid block (12) is in a horizontal state.
  5. 5. The fall protection buffer system of the construction elevator, as set forth in claim 4, wherein the multistage buffering energy consumption unit further comprises a secondary acceleration suppression unit installed in the vertical guide rail (203), the secondary acceleration suppression unit comprises a clamping shaft adhesive tape (4) fixedly connected between the left inner wall and the right inner wall of the vertical guide rail (203) and a plurality of anti-bracing strips (3) transversely penetrating through the two clamping shaft adhesive tapes (4) and the vertical guide rail (203).
  6. 6. The anti-falling buffer system for the construction elevator is characterized in that the clamping shaft adhesive tapes (4) are made of elastic wear-resistant and high-temperature-resistant materials, the distance between the two clamping shaft adhesive tapes (4) is smaller than the diameter of the rotating shaft (13), a plurality of mutually corresponding metal elastic sheets are fixedly inlaid at one ends, close to each other, of the two clamping shaft adhesive tapes (4), and the section of each metal elastic sheet is arc-shaped and is matched with the rotating shaft (13).
  7. 7. The anti-falling buffer system of the construction elevator is characterized in that the tensile bar (3) comprises two pairs of limiting hemispheres which are opposite to each other in a spherical surface, a metal bar (32) which movably penetrates through the two pairs of limiting hemispheres and an outer sheath (33) which wraps the outer ends of the metal bar (32), the two pairs of limiting hemispheres are respectively positioned on two sides of the vertical guide rail (203) and are in collision with the vertical guide rail (203), the limiting hemispheres comprise a limiting layer (311) and a space occupying layer (312) fixedly connected to the end part of the limiting layer (311), and the limiting layer (311) is fixedly connected with the space occupying layer (312).
  8. 8. The anti-falling buffer system for the construction hoist according to claim 7, wherein the occupied layers (312) of the two limit hemispheres are in contact with each other, the limit layers (311) are of a hard structure, the occupied layers (312) are of an elastic structure, and the maximum diameter of the limit layers (311) is 3-5 times of the diameter of the metal strip (32).
  9. 9. The fall protection buffer system for construction elevators according to claim 8, wherein the distance between two adjacent tension strips (3) is smaller than the distance between two reverse suppressors (1) and not larger than 3 times the distance between the upper and lower inner walls of the guide groove (201), and the limit position of the middle part of the metal strip (32) when being stretched downwards is lower than the position of the next tension strip (3).

Description

Anti-falling buffer system of construction elevator Technical Field The invention relates to the technical field of elevators, in particular to a fall-preventing buffer system of a construction elevator. Background The construction lifter is a hoisting machine for vertically conveying people or objects, various plane conveying devices are often arranged on a lifting platform, and the lifting platform is used as a connecting device of conveying lines with different heights and is generally driven by hydraulic pressure, so the construction lifter is called as a hydraulic lifting platform and is widely applied to construction operations such as high-altitude installation, maintenance and the like besides being used for conveying goods with different heights. Currently, elevators commonly employ electrically or electromechanically linked band-type brake systems as primary fall protection measures. The system can emergently brake when overspeed is detected, and the effectiveness of the system is widely verified. However, there is still room for improvement in the existing fall arrest technology. Firstly, the band-type brake system is highly dependent on an electric power and control system, and has failure risk when power is cut off or electric faults occur unexpectedly, for example, a band-type brake control system of a construction lifter disclosed in Chinese patent CN115549527B and a motor band-type brake control system of a construction lifter disclosed in Chinese patent CN 104753403B. Secondly, as an active braking device, under extreme working conditions (such as abrasion of a braking surface and overlarge impact load), the situation of insufficient braking force or insufficient buffering after single braking possibly occurs, so that the suspension cage is accelerated secondarily, the bottom is impacted at a higher speed finally, huge impact force is generated, and great potential safety hazards exist. Disclosure of Invention The invention has the core that a mechanical multistage buffering energy consumption unit is added on the upright post of the elevator, a key second safety line is provided for abnormal falling of the suspension cage, the suspension cage is independent of electric power, a plurality of reverse suppressors can sequentially pass through compression energy consumption of a rubber sheet and bending fracture of a guide rod even when power is off, and continuously absorb falling energy, so that the final landing speed and impact force of the suspension cage are obviously reduced, and meanwhile, the secondary acceleration amplitude generated after buffering of the suspension cage can be effectively restrained, the pause feeling is reduced, and the damage is reduced under the arrangement of a secondary acceleration suppression unit. In order to solve the problems, the invention adopts the following technical scheme. The utility model provides a construction elevator buffer system that prevents falling, including setting up the controller on the lift, install the speed sensor on the lift cage, band-type brake system and the multistage buffering power consumption unit of installing on the I-shaped stand of lift on the cage lifting wheel, multistage buffering power consumption unit includes a plurality of reverse suppressors of installing on I-shaped stand and being close to cage one side tip, reverse suppressor includes step backplate and connects the trapezoidal dog at step backplate middle part through pivot and torsion spring, the fixed mounting has the electromagnetic plate on the terminal surface that is close to trapezoidal dog of step backplate upper half, the switch-on and switch-off of electromagnetic plate is controlled by the controller, the left and right sides inner wall of I-shaped stand all fixedly connected with vertical rail, the both ends of pivot are connected with two vertical rail sliding respectively; The back of the step-shaped backboard is fixedly connected with a plurality of guide rods, a plurality of groups of guide grooves which are respectively and correspondingly arranged with the plurality of reverse suppressors are cut on the I-shaped upright post, the number of each group of guide grooves is consistent with the number of the guide rods on the corresponding reverse suppressors, the guide rods movably penetrate through the guide grooves and are fixedly connected with fastening nuts, rubber sheets are fixedly connected in the bottoms of the guide grooves, and the guide rods are in contact with the rubber sheets. Further, the rubber sheet is made of high-toughness materials, the edges of the upper end and the lower end of the guide groove are semicircular, the middle part of the guide groove is rectangular, a gap is reserved right below the joint of the guide rod and the step-shaped backboard, and the depth of the gap is not more than 2/3 of the diameter of the guide rod. Further, the upper pressure sensor and the lower pressure sensor are respectively installed at