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CN-121976670-A - Locking connecting tool of steel bar straight thread sleeve

CN121976670ACN 121976670 ACN121976670 ACN 121976670ACN-121976670-A

Abstract

The invention relates to the technical field of building construction, in particular to a locking connecting tool for a steel bar straight thread sleeve. The device comprises a base, a fixed column fixedly connected to one end of the base, and a movable column slidably connected to the other end of the base, wherein the fixed column and the movable column are coaxially arranged, the fixed column and the movable column are respectively provided with a radial synchronous clamping mechanism for clamping reinforcing steel bars, and a supporting component for supporting the reinforcing steel bars is arranged between the fixed column and the movable column. The device can clamp the steel bars accurately, avoids steel bar deflection or sleeve rotation during connection, ensures synchronous driving of a plurality of groups of screw rods by combining the worm gear and the gear ring and the driven gear, ensures uniform clamping force and incapability of loosening by reverse torsion, solves the problems of slipping and unstable connection of the traditional tool, and has strong adaptability by adapting the support component to the steel bars and the sleeves with different lengths of the slidable movable column, thereby greatly improving the large-scale construction efficiency and the stability of connection quality.

Inventors

  • MA ZIQIANG
  • WANG ZHEN
  • PAN MENGYANG
  • LI XIAOYU

Assignees

  • 中建筑港集团有限公司

Dates

Publication Date
20260505
Application Date
20260119

Claims (8)

  1. 1. The anti-loosening connecting tool for the steel bar straight thread sleeve comprises a base (1), a fixed column (2) fixedly connected to one end of the base (1) and a movable column (3) slidably connected to the other end of the base (1), and is characterized in that the fixed column (2) and the movable column (3) are coaxially arranged, radial synchronous clamping mechanisms (4) for clamping steel bars are arranged on the fixed column (2) and the movable column (3), and a supporting component for supporting the steel bars is arranged between the fixed column (2) and the movable column (3); the radial synchronous clamping mechanism (4) comprises: a support cylinder (41), wherein the support cylinder (41) is a cylindrical cylinder body which is horizontally arranged; The radial clamping blocks (43) are arranged in a plurality of groups and are uniformly distributed along the circumferential direction of the supporting cylinder (41), and one end, close to the axis of the supporting cylinder (41), of each radial clamping block (43) is used for clamping the steel bars to be connected; the supporting plate (45), the supporting plate (45) is fixedly connected to the inner wall of the supporting cylinder (41), and the radial clamping block (43) is slidably connected to the supporting plate (45); the wedge-shaped block (42) is slidably connected to the inner side wall of the supporting cylinder (41), a first inclined surface is arranged on one side, facing the axis of the supporting cylinder (41), of the wedge-shaped block (42), a second inclined surface matched with the wedge-shaped block (42) is correspondingly arranged on the radial clamping block (43), the wedge-shaped block (42) and the radial clamping block (43) are in fit through the inclined surfaces to form transmission fit, and the radial clamping block (43) is driven to clamp towards the axis direction of the supporting cylinder (41) through inclined surface stress conversion; The screw rod (44) is arranged on the wedge-shaped block (42) in a penetrating mode through threads, and the screw rod (44) is rotatably connected to the supporting cylinder (41); The driving self-locking assembly is used for driving the screw rod (44) to synchronously rotate and comprises driven gears (51) fixedly connected with the end parts of the screw rod (44), gear rings (52) meshed with the driven gears (51), worm gear teeth (53) integrally formed with the outer side walls of the gear rings (52), a worm (55) meshed with the worm gear teeth (53) and a supporting shell (54) fixedly connected to the supporting cylinder (41), wherein the worm (55) is rotationally connected to the supporting shell (54), and the gear rings (52) are rotationally connected to the supporting cylinder (41); The radial synchronous clamping mechanisms (4) are arranged in two groups, the two groups of the radial synchronous clamping mechanisms (4) are coaxially arranged, one group of supporting cylinders (41) of the radial synchronous clamping mechanisms (4) are rotatably connected to the movable column (3), and the other group of supporting cylinders (41) of the radial synchronous clamping mechanisms (4) are fixedly connected to the fixed column (2).
  2. 2. The anti-loosening connecting tool for the steel bar straight threaded sleeve is characterized in that one side, close to the axis of the supporting cylinder (41), of the radial clamping block (43) is an arc-shaped surface, and anti-skid insections are arranged on the arc-shaped surface and used for enhancing the clamping friction force on the steel bars.
  3. 3. The anti-loosening connecting tool for the steel bar straight threaded sleeve is characterized in that a locking cylinder (72) is fixedly connected to the movable column (3), a locking screw (71) is arranged on the locking cylinder (72) in a penetrating mode through threads, and the lower end of the locking screw (71) is fixedly connected with a rubber pad abutted against the outer wall of the supporting cylinder (41).
  4. 4. The anti-loosening connecting tool for the steel bar straight threaded sleeve according to claim 1, wherein the radial clamping block (43) is fixedly connected with a sliding block (46), a sliding groove matched with the sliding block (46) is formed in the supporting plate (45), a return spring (47) is arranged in the sliding groove, the return spring (47) is arranged along the length direction of the sliding groove, one end of the return spring is abutted against the side wall of the radial clamping block (43), and the other end of the return spring is fixed with the groove wall of the sliding groove and is used for driving the radial clamping block (43) to reset.
  5. 5. The anti-loosening connecting tool for the steel bar straight threaded sleeve of claim 1, wherein the first inclined surface of the wedge block (42) is inclined at an angle of 15-60 degrees, and the second inclined surface is identical to the first inclined surface in inclination angle.
  6. 6. The anti-loosening connecting tool for the steel bar straight threaded sleeve is characterized in that the supporting component comprises a U-shaped rod (81) for supporting the straight threaded sleeve, a first rod piece (82) fixedly connected with the U-shaped rod (81), a second sleeve rod (83) sleeved on the first rod piece (82), and a positioning screw rod (84) penetrating through the outer wall of the second sleeve rod (83) through threads, the second sleeve rod (83) is fixedly connected to the base (1), and the lower end of the positioning screw rod (84) is fixedly connected with an anti-skid pad abutted against the outer wall of the first rod piece (82).
  7. 7. The anti-loosening connecting tool for the steel bar straight threaded sleeve according to claim 1, wherein a rotating hand wheel (6) for driving the support cylinder (41) rotatably connected with the movable column (3) to rotate is fixedly connected with the support cylinder.
  8. 8. The anti-loosening connecting tool for the steel bar straight threaded sleeve according to claim 1, wherein the number of the radial clamping blocks (43) and the number of the wedge-shaped blocks (42) are 3-6, and the radial clamping blocks and the wedge-shaped blocks are distributed at equal intervals along the circumferential direction of the supporting cylinder (41) so as to ensure balanced clamping stress on the steel bars.

Description

Locking connecting tool of steel bar straight thread sleeve Technical Field The invention relates to the technical field of building construction, in particular to a locking connecting tool for a steel bar straight thread sleeve. Background Along with the rapid development of the infrastructure construction field of buildings, bridges, water transportation and the like, deep foundation engineering such as a diaphragm wall, a filling pile and the like continuously breaks through towards the ultra-deep direction, and the construction scale and the technical difficulty of main structures such as high-rise, ultra-high-rise and large-span bridges and the like are continuously improved. In such large projects, the structural stress has extremely high requirements on the length and the integrity of the reinforcing steel bars, and the standard length reinforcing steel bars commonly used in the market are difficult to meet the construction requirements, so that the on-site connection and lengthening operation of the reinforcing steel bars become key procedures for guaranteeing the project quality and the construction progress. According to the water transport engineering construction Specification (JTS 206-2-2023) and the explicit requirements of related industry standards, when the diameter of the steel bar is greater than or equal to 20mm, mechanical joints are preferably used to ensure the connection strength and stability. The straight thread sleeve connection has the advantages of high connection strength, convenience in construction, high quality controllability and the like, and becomes the mechanical connection mode with the widest application range and the largest use quantity at present. However, in the current straight thread sleeve connection construction, a pipe wrench or an ordinary wrench is generally adopted as a tightening tool on site, and the operation mode has obvious defects that two workers are needed to cooperate in construction to respectively hold the reinforcing steel bars at two ends of the straight thread sleeve, one end of the reinforcing steel bar is clamped and fixed at first, and then the reinforcing steel bars at the other end are rotated, so that the wire heads of the reinforcing steel bars at two ends are gradually screwed into the sleeve to finish connection. However, the clamping surfaces of the pipe wrench and the spanner are mostly planes or simple tooth surfaces, the joint degree with the cylindrical surface of the steel bar is poor, the phenomenon of slipping is very easy to occur, and moreover, the strength and stability of manual force application are difficult to control, so that the steel bar wire head cannot be completely screwed into the sleeve, the tightening torque required by the standard cannot be achieved, the joint connection is not firm, and the hidden structural safety trouble is left. Meanwhile, frequent slipping and reworking greatly reduce the operation efficiency, prolong the construction period and are difficult to adapt to the large-scale construction requirements of large-scale engineering. Chinese patent CN202310946869.4 discloses a quick-mounting straight thread sleeve tightening tool and a using method, publication No. CN117027406a, the device comprises a fixing ring and an operating rod arranged on the fixing ring, a gap for moving in or out a reinforcing steel bar is arranged on one side of the fixing ring away from the operating rod, two clamping blocks are arranged in the fixing ring in a sliding manner, the sliding direction of the clamping blocks is perpendicular to the axial direction of the fixing ring, the two clamping blocks are used for clamping or loosening the reinforcing steel bar, and an adjusting mechanism for adjusting the two clamping blocks to be close to or far away from each other is arranged on the fixing ring. The clamping block of the device is difficult to stably clamp the steel bar, the clamping block of the device is driven only through a first bidirectional screw rod, a gear rack and a spring at one end, the other end of the clamping block is free of any constraint or connecting structure, the other end of the clamping block is in a suspended state, when the clamping blocks are mutually close to the steel bar to be clamped, one end of the clamping block is constrained by force, the other end of the clamping block is free of any support and constraint, the arc-shaped joint surface of the clamping block cannot be in full contact with the surface of the steel bar, only partial force is applied, single-side press contact is formed, when a worker rotates the steel bar by means of the device, the steel bar can generate reverse force on the clamping block, so that the clamping block is deformed in a buckling mode around a connecting point of a driving end, namely, the suspending end of the clamping block is outwards lifted, the clamping block is separated from contact with the steel bar, and the clamping force is instantaneously lo