Anti-knotting device for reinforcing steel bar

Abstract

The utility model discloses a steel bar anti-knotting device which comprises a support (1), four feeding rollers (2) are arranged in the support (1), the four feeding rollers (2) form a #-shaped structure, a square feeding port (3) is formed among the four feeding rollers (2), the diameter of each feeding roller (2) is 55-65 mm, and the side length of the feeding port (3) is 80-100 mm. Wherein two feeding rollers (2) are vertically arranged, the two vertically-arranged feeding rollers (2) are located on the same cross section of the support (1), the other two feeding rollers (2) are transversely arranged, and the two transversely-arranged feeding rollers (2) are located on the other cross section of the support (1); the distance between the vertically-arranged feeding roller (2) and the transversely-arranged feeding roller (2) is smaller than 1 cm. The device has the advantages of being capable of reducing steel bar knotting and convenient to maintain.

Description

Technical Field

[0001] The utility model belongs to the field of steel bar straightening machines, and particularly relates to a steel bar anti-knotting device used on a steel bar straightening machine. Background Art

[0002] Steel bars, including ribbed steel bars and round steel bars, are straight when produced in a steel mill. However, for the convenience of delivery, they are usually coiled into rolls to form coil steel bars. Before actual use, they need to be restored to a straight shape on a steel bar straightening machine.

[0003] The feeding end of the existing steel bar straightening machine is provided with a guiding mechanism for steel bars. The guiding mechanism includes a square-tube-shaped bracket. Inside the bracket, there are two vertical feeding rollers and two horizontal feeding rollers. The diameter of the feeding rollers is 38 mm. The four feeding rollers form a cross structure, and a square feeding port with a side length of 40 mm is formed between the four feeding rollers. The bent steel bars first pass through the feeding port and then enter the steel bar straightening machine for straightening. However, it is found during use that the steel bars are prone to knotting at the guiding mechanism, and workers need to stop the machine to re-straighten the steel bars and then continue the straightening operation, which reduces the straightening efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a steel bar anti-knotting device. The utility model has the advantages of reducing steel bar knotting and being convenient for maintenance.

[0005] The technical solution of the utility model: The steel bar anti-knotting device includes a bracket. Inside the bracket, there are four feeding rollers. The four feeding rollers form a cross structure, and a square feeding port is formed between the four feeding rollers. The diameter of the feeding rollers is 55 - 65 mm, and the side length of the feeding port is 80 - 100 mm.

[0006] In the aforesaid steel bar anti-knotting device, the diameter of the feeding rollers is 59 mm, and the side length of the feeding port is 85 mm.

[0007] In the aforesaid steel bar anti-knotting device, two of the feeding rollers are vertically arranged. The two vertically arranged feeding rollers are located on the same cross-section of the bracket. The other two feeding rollers are horizontally arranged. The two horizontally arranged feeding rollers are located on another cross-section of the bracket.

[0008] In the aforesaid steel bar anti-knotting device, the distance between the vertically arranged feeding rollers and the horizontally arranged feeding rollers is less than 1 cm.

[0009] In the aforesaid steel bar anti-knotting device, the distance between the vertically arranged feeding rollers and the horizontally arranged feeding rollers is 0.6 cm.

[0010] In the aforesaid steel bar anti-knotting device, the bracket is square tubular, a rotating shaft is arranged inside the feeding roller, both ends of the rotating shaft are fixed to the bracket, and two bearings are arranged between the rotating shaft and the feeding roller, and the two bearings are respectively located at both ends of the feeding roller.

[0011] In the aforesaid steel bar anti-knotting device, the bearing is tightly and matingly connected with the feeding roller, and the bearing is loosely and matingly connected with the rotating shaft.

[0012] In the aforesaid steel bar anti-knotting device, one end of the rotating shaft is provided with a flat head passing through the bracket, and the outer side end of the flat head extends radially outwards to form a baffle plate fitting with the outer side wall of the bracket, the other end of the rotating shaft passes through the bracket, and a split pin is radially arranged thereon.

[0013] In the aforesaid steel bar anti-knotting device, both ends of the feeding roller are provided with concave steps, the outer ring of the bearing fits with the bottom surface of the concave step, the inner ring of the bearing close to the flat head fits with the inner side end of the flat head, and a limiting retaining sleeve is arranged on the outer side of the bearing far from the flat head, and the limiting retaining sleeve is penetrated by the rotating shaft.

[0014] In the aforesaid steel bar anti-knotting device, the feeding roller comprises a carbon fiber tube with a wall thickness of 2-4 mm, and a steel sleeve with a wall thickness of less than 1 mm is arranged on the outer side of the carbon fiber tube.

[0015] Compared with the prior art, on the basis of the existing guiding mechanism, the following improvements are made to the present utility model:

[0016] 1). Improvement of the diameter dimension of the feeding roller and the dimension of the feeding port formed by the four feeding rollers. The applicant finds that the main reason for the knotting of the existing coiled steel bars on the existing guiding mechanism is that after the coiled steel bars are wound, when the steel bars are re-led out from the steel bar coil, they are in a spiral shape, and the outer diameter of the existing feeding roller is small, and the size of the formed feeding port is also small, and the pitch of the steel bars is easily stuck on the feeding roller or the feeding port, resulting in the knotting of the steel bars. Therefore, the present utility model increases the diameter of the feeding roller and enlarges the feeding port, improving the phenomenon of steel bar knotting.

[0017] 2). Improvement of the structure of the feeding roller. The applicant also finds that the secondary reason for the knotting of the existing coiled steel bars on the existing guiding mechanism is that the existing feeding roller is a solid steel bar, with a large mass, and it is difficult for the moving steel bars to drive the feeding roller to rotate, resulting in a relatively large relative friction speed between the steel bars and the feeding roller, and the outer surface of the feeding roller is easily scratched. Therefore, the present utility model sets the feeding roller as a hollow structure, the inner layer of the feeding roller is a lightweight but high-strength carbon fiber tube, and the outer side is a wear-resistant steel sleeve, greatly reducing the weight of the feeding roller, making the feeding roller easily driven by the steel bars, reducing the relative friction speed between the steel bars and the feeding roller, making the surface of the feeding roller not easily scratched, ensuring the smooth movement of the steel bars, and thus not easily knotting.

[0018] After the above improvements 1) and 2), through actual tests, the knotting probability of the steel bars is reduced by about 50%, and thus the straightening efficiency of the steel bars can be increased by about 10%.

[0019] 3) Improvement of the connection structure between the feeding roller and the bracket. After the surface of the feeding roller is worn, it is easy to replace. Only need to pull out the split pin to remove the feeding roller and replace it with a new one, so the maintenance is convenient.

[0020] In summary, the utility model has the advantages of reducing the knotting of steel bars and convenient maintenance. Description of the Drawings

[0021] Figure 1 It is a front view schematic diagram of the utility model.

[0022] Figure 2 It is a left view schematic diagram of the utility model.

[0023] Figure 3 It is a front view schematic diagram of the feeding roller.

[0024] The reference signs in the drawings are: 1 - bracket, 2 - feeding roller, 3 - feeding port, 4 - rotating shaft, 5 - bearing, 6 - flat head, 7 - baffle, 8 - split pin, 9 - concave step, 10 - limit retaining sleeve, 11 - carbon fiber tube, 12 - steel sleeve. Detailed Embodiment

[0025] The following further describes the utility model in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the utility model.

[0026] Embodiment. A steel bar anti-knotting device is used for straightening coiled steel bars (φ6 - φ12mm). As Figure 1 shown, it includes a square tubular bracket 1. Four feeding rollers 2 are arranged inside the bracket 1. Looking from the axial direction of the bracket 1, the four feeding rollers 2 form a cross structure, and a square feeding port 3 is formed between the four feeding rollers 2. The features are as follows:

[0027] The diameter of the feeding roller 2 is 59mm, and the side length of the feeding port 3 is 85mm.

[0028] Two of the feeding rollers 2 are arranged vertically. The two vertically arranged feeding rollers 2 are located on the same cross-section of the bracket 1, and the other two feeding rollers 2 are arranged horizontally. The two horizontally arranged feeding rollers 2 are located on another cross-section of the bracket 1.

[0029] The distance between the vertically arranged feeding roller 2 and the horizontally arranged feeding roller 2 is 0.6 cm.

[0030] A rotating shaft 4 is provided inside the feeding roller 2. There are two bearings 5 between the rotating shaft 4 and the feeding roller 2, and the two bearings 5 are respectively located at both ends of the feeding roller 2. The bearing 5 is tightly fitted with the feeding roller 2, and the bearing 5 is loosely fitted with the rotating shaft 4.

[0031] One end of the rotating shaft 4 is provided with a flat head 6 passing through the bracket 1. The outer end of the flat head 6 extends radially outward to form a baffle 7 that fits against the outer wall of the bracket 1. The other end of the rotating shaft 4 passes through the bracket 1, and a split pin 8 is radially inserted through it.

[0032] Both ends of the feeding roller 2 are provided with concave steps 9. The outer ring of the bearing 5 fits against the bottom surface of the concave step 9. The inner ring of the bearing 5 close to the flat head 6 fits against the inner end of the flat head 6. A limit retaining sleeve 10 is provided on the outer side of the bearing 5 away from the flat head 6, and the limit retaining sleeve 10 is passed through by the rotating shaft 4.

[0033] The feeding roller 2 includes a carbon fiber tube 11 with a wall thickness of 3 mm. A steel sleeve 12 with a wall thickness of 0.8 mm is provided on the outer side of the carbon fiber tube 11. The material of the steel sleeve 12 is preferably bearing steel with good wear resistance.

[0034] Working principle: The steel bar passes through the feeding port 3, guiding the steel bar into the straightening mechanism of the steel bar straightening machine. The steel bar contacts the feeding roller 2, driving the feeding roller 2 to rotate accordingly.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A steel bar anti-knot device, comprising a support (1), wherein four feed rollers (2) are arranged in the support (1), the four feed rollers (2) form a tic-tac-toe structure, and a square feed port (3) is formed between the four feed rollers (2), wherein the device is characterized in that: The diameter of the feed roller (2) is 55-65 mm, and the side length of the feed port (3) is 80-100 mm.

2. The steel bar anti-knot device according to claim 1, characterized in that: The diameter of the feed roller (2) is 59 mm, and the side length of the feed port (3) is 85 mm.

3. The steel bar anti-knot device according to claim 1 or 2, characterized in that: Two of the feed rollers (2) are arranged vertically, and the two feed rollers (2) arranged vertically are located on the same cross section of the bracket (1); the other two feed rollers (2) are arranged horizontally, and the two feed rollers (2) arranged horizontally are located on another cross section of the bracket (1).

4. The steel bar anti-knot device according to claim 3, characterized in that: The distance between the vertically arranged feeding roller (2) and the horizontally arranged feeding roller (2) is less than 1 cm.

5. The steel bar anti-knot device according to claim 4, characterized in that: The distance between the vertically arranged feeding roller (2) and the horizontally arranged feeding roller (2) is 0.6 cm.

6. The steel bar anti-knot device according to claim 1, characterized in that: The support (1) is in the shape of a square tube. A rotating shaft (4) is arranged inside the feed roller (2). Both ends of the rotating shaft (4) are fixed to the support (1). Two bearings (5) are arranged between the rotating shaft (4) and the feed roller (2). The two bearings (5) are respectively located at both ends of the feed roller (2).

7. The steel bar anti-knot device according to claim 6, characterized in that: The bearing (5) is tightly connected to the feed roller (2), and the bearing (5) is loosely connected to the rotating shaft (4).

8. The steel bar anti-knot device according to claim 6, characterized in that: One end of the rotating shaft (4) is provided with a flat head (6) passing through the bracket (1), and the outer end of the flat head (6) extends radially outward to form a baffle (7) that fits the outer wall of the bracket (1). The other end of the rotating shaft (4) passes through the bracket (1) and is provided with a split pin (8) in the radial direction.

9. The steel bar anti-knot device according to claim 8, characterized in that: Both ends of the feed roller (2) are provided with a concave step (9), the outer ring of the bearing (5) is fitted to the bottom surface of the concave step (9), the inner ring of the bearing (5) close to the flat head (6) is fitted to the inner side end of the flat head (6), and a limit stop sleeve (10) is provided on the outer side of the bearing (5) away from the flat head (6), and the limit stop sleeve (10) is passed through the rotating shaft (4).

10. The steel bar anti-knot device according to claim 1, characterized in that: The feed roller (2) comprises a carbon fiber tube (11) with a wall thickness of 2-4 mm, and a steel sleeve (12) with a wall thickness of less than 1 mm is provided on the outer side of the carbon fiber tube (11).

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