CN111119160A

CN111119160A - Unidirectional self-locking type steel bar quick joint

Info

Publication number: CN111119160A
Application number: CN202010021581.2A
Authority: CN
Inventors: 潘国庆; 姜弘; 张银屏; 陈鼐基
Original assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Current assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-05-08

Abstract

The invention discloses a one-way self-locking type steel bar quick connector which comprises a force transmission box, a thread clamping piece, an elastic piece, a buffer ring and a butt joint barrel, wherein one side of the force transmission box is in butt joint with a steel bar to be inserted, the other side of the force transmission box is connected with the butt joint barrel, and the elastic piece is arranged between the butt joint barrel and the thread clamping piece. Due to the structural design, the steel bars are quickly connected under the action of pressure in a self-locking mode; in the construction process of the reinforcement cage, the joint can be screwed into the reinforcement at the same section position, and then the reinforcement cage is spliced with another butted reinforcement cage under the mechanical action, and because the force transmission box has fault tolerance allowance, the two reinforcement cages can be butted better and faster; compared with the traditional mechanical joint and welding joint, the method can be used for batch operation, greatly quickens the construction progress, ensures the engineering quality and has great popularization value.

Description

Unidirectional self-locking type steel bar quick joint

Technical Field

The invention relates to the technical field of steel bar connection structures, in particular to a one-way self-locking steel bar quick connector.

Background

The underground space of the city is developed more and more mature, the development depth is deepened continuously, the underground continuous wall in the foundation pit engineering is used more and more frequently, the depth is deepened continuously, the number of the steel bars and the steel bar joints is increased remarkably, and the requirements on the quality of the steel bar connecting joints and the construction time are obviously improved. Generally, the reinforcing steel bars in the reinforcing cage are connected by mechanical connection and welding method to achieve the function of internal force transmission.

The mechanical connection of reinforcing bars refers to a connection method of transmitting the force in one reinforcing bar to another reinforcing bar by the mechanical engagement action of a connecting piece (a connection joint) or the pressure bearing action of the end face of the reinforcing bar, and the connecting piece mostly adopts a straight thread connection joint at present. During construction, the joint is screwed into the straight threads at the end parts of the two reinforcing steel bars through the torque wrench, so that the reinforcing steel bars are mechanically connected with the reinforcing steel bars through the straight thread joint.

The steel bar welding is to extend or cross-connect the steel bars along the axial direction by electric welding equipment. Common methods of welding steel bars include flash butt welding, arc welding, electroslag pressure welding, resistance spot welding, and gas pressure welding. For conventional structural members, welding work is generally performed at a construction site in consideration of transportation conditions, engineering risks, and the like.

At present, in a conventional structure, for example, the length of a reinforcement cage of an underground continuous wall is 40-60 m, the maximum length can exceed 100m, the maximum leaving length of a reinforcement is only 12 m, and a single underground continuous wall generally contains multiple rows of reinforcements, so that a reinforced concrete member has extremely many reinforcement joints. For a straight thread joint, because the straight thread joint needs to be in screwing butt joint with reinforcing steel bars on two sides, the phenomenon that the reinforcing steel bars on two sides are not screwed in the same depth and the reinforcing steel bar threads are exposed outside the joint often occurs in actual operation, and the force transmission performance of the reinforcing steel bars is influenced; the on-site welding of the reinforcing steel bars is difficult to ensure the quality, and the feasibility of realizing the mechanized operation is low, which is contrary to the trend of the future industrial development.

The person skilled in the art is dedicated to solving the above technical drawbacks.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the technical object of the present invention is to solve the problems mentioned in the above-mentioned background art.

In order to achieve the technical purpose, the invention provides a one-way self-locking type steel bar quick connector which comprises a force transmission box, a thread clamping piece, an elastic piece, a buffer ring and a butt joint barrel, wherein one side of the force transmission box is in butt joint with a steel bar to be inserted, the other side of the force transmission box is connected with the butt joint barrel, the elastic piece is arranged between the butt joint barrel and the thread clamping piece, and the buffer ring is arranged on the inner side of the elastic piece; the force transfer box is provided with an outward expansion angle at the butt joint side of the steel bar to be inserted, and the force transfer box is provided with fault tolerance allowance of the insertion angle and the insertion position at the butt joint side of the steel bar to be inserted; preferably, the spring clamping piece is of a conical structure formed by a plurality of pieces, the spring clamping piece is supported by the elastic piece, and a hole is reserved in the middle of the spring clamping piece.

Preferably, the inner side of the hole is provided with a thread, and the thread is matched with the thread of the end of the steel bar to be inserted.

Preferably, the inner wall of the butt joint barrel is provided with a thread matched with a thread inserted into the steel bar in advance.

The invention has the beneficial effects that:

due to the structural design, the steel bars are quickly connected under the action of pressure in a self-locking mode; in the construction process of the reinforcement cage, the joint can be screwed into the reinforcement at the same section position, and then the reinforcement cage is spliced with another butted reinforcement cage under the mechanical action, and because the force transmission box has fault tolerance allowance, the two reinforcement cages can be butted better and faster; compared with the traditional mechanical joint and welding joint, the method can be used for batch operation, greatly quickens the construction progress, ensures the engineering quality and has great popularization value.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: the device comprises a force transmission box 1, a thread clamping piece 2, an elastic piece 3, a buffer ring 4, a steel bar 5 to be inserted, a steel bar 6 to be inserted in advance and a butt joint barrel 7.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in figure 1, the one-way self-locking type steel bar quick connector comprises a force transmission box 1, a thread clamping piece 2, an elastic piece 3, a buffer ring 4 and a butt joint barrel 7.

Specifically, the force transmission box 1 is provided with an outward expansion angle at the butt joint side of the steel bar 5 to be inserted, and the force transmission box 1 is provided with a certain insertion angle and a certain fault tolerance margin at the butt joint side of the steel bar 5 to be inserted.

Specifically, be equipped with between a butt joint section of thick bamboo 7 and the screw thread clamping piece 2 and supporting elastic component 3 for example the spring, and be provided with PVC buffering circle 4 in elastic component 3 inboard, reduce the impact force of reinforcing bar insertion in-process, combine to pass the angle setting of flare of power case 1 position department, and then reach many reinforcing bars and a plurality of joints and be connected simultaneously in same section position, shorten the time of steel bar connection by a wide margin.

Specifically, the spring clip 2 is a conical structure formed by 3 pieces (each 120 degrees), the spring clip 2 is supported by the elastic piece 3, and a hole is reserved in the middle of the spring clip 2 for inserting the steel bar 5 to be inserted.

Of course, in different embodiments, the spring clip 2 may also be formed in a tapered structure with 4, 5 or other positive integers.

Specifically, the inner side of the hole is provided with a thread, and the thread is matched with a thread to be inserted into the end of the steel bar 5.

Specifically, the thread clamping piece 2 is tightly attached to the force transmission box 1 under the elastic force action of the elastic piece 3. The inner wall of the butt joint barrel 7 is also provided with threads which are consistent with the threads of the steel bar 6 inserted in advance, so that the reliable connection between the steel bar 6 inserted in advance and the butt joint barrel 7 is ensured.

When the screw thread clamping piece is used, the inserted steel bar 6 and the butt joint barrel 7 are screwed and fixed, then the steel bar 5 to be inserted is inserted from the other side, and the steel bar 5 to be inserted is contacted with the screw thread clamping piece 2 under the action of external force; the thread clamping pieces 2 extrude the elastic piece 3 along the inner side of the force transmission box 1 under the action of an external force transmitted by the steel bar 5 to be inserted, the thread clamping pieces 2 gradually penetrate into the joint and are separated from each other, and the hole in the middle of the spring clamping piece 2 is enlarged, so that the steel bar 5 to be inserted can be inserted.

After the steel bar 5 to be inserted is inserted to the bottom, the thread clamping piece 2 is tightened under the action of the elastic piece 3, and the thread on the thread clamping piece 2 is attached to the thread on the outer side of the steel bar 5 to be inserted to prevent the steel bar 5 to be inserted from being pulled out.

When an emergency happens and the steel bar is separated from the joint, the joint (the force transmission box 1 and the butt joint barrel 7) or the threaded steel bar (the steel bar 5 to be inserted and the steel bar 6 to be inserted in advance) can be rotated, the joint and the threaded steel bar can rotate along the thread, and finally the joint and the threaded steel bar are separated.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides an one-way self-locking type reinforcing bar quick-operation joint, includes biography power case (1), screw thread clamping piece (2), elastic component (3), buffer ring (4) and butt joint section of thick bamboo (7), its characterized in that: a steel bar (5) to be inserted is butted at one side of the force transmission box (1), the other side of the force transmission box (1) is connected with the butt joint cylinder (7), an elastic part (3) is arranged between the butt joint cylinder and the threaded clamping piece (2), and the inner side of the elastic part (3) is provided with the buffer ring (4); the force transmission box (1) is provided with an outward-opening angle at the butt joint side of the steel bar (5) to be inserted, and the force transmission box (1) is provided with fault-tolerant allowance of the insertion angle and the position at the butt joint side of the steel bar (5) to be inserted; the spring clamping piece (2) is of a conical structure formed by a plurality of pieces, the spring clamping piece (2) is supported by the elastic piece (3), and a hole is reserved in the middle of the spring clamping piece (2).

2. A one-way self-locking steel bar quick connector as recited in claim 1, wherein: and the inner side of the hole is provided with a thread, and the thread is matched with the thread at the end of the steel bar (5) to be inserted.

3. A one-way self-locking steel bar quick connector as recited in claim 2, wherein: the inner wall of the butt joint barrel (7) is provided with threads matched with the threads inserted into the reinforcing steel bars (6) in advance.