Auxiliary heating device for hot working of steel bar

Abstract

An auxiliary heating device for hot working of a steel bar is characterized in that an air suction cover is arranged outside a heating sleeve, and an air outlet of the air suction cover is communicated with an air inlet of a suction fan; and a heating cover is sleeved outside the steel bar positioned at the left end of the left supporting plate, and is communicated with an air outlet of the suction fan. According to the induction heating device, waste heat generated by induction heating is sucked into the heating cover through the suction fan to preheat a steel bar which is not subjected to induction heating, so that the waste heat is recycled, the waste of heat energy is reduced, and meanwhile, the stress of the steel bar can be better eliminated and the cracking phenomenon of the steel bar is reduced through preheating in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar processing, in particular to an auxiliary heating device for hot processing of steel bars. Background Art

[0002] Prestressed concrete steel bars (steel bars for short) have been widely used in high-strength prestressed concrete centrifugal pipe piles, electric poles, viaduct piers, railway sleepers and other prestressed components abroad due to their high strength toughness, low relaxation, strong bond with concrete, good weldability, upsetting properties, and material saving (such as φ11mm PC steel bars can replace φ20mm hot-rolled steel bars). They have a very broad market internationally, especially in Asia.

[0003] The rolled steel rod needs to be heated after unwinding in order to eliminate the stress in the steel rod itself to avoid cracking when subjected to external force. At present, induction heating is generally used to heat the steel rod. Since the induction coil is exposed to the atmosphere, part of the heat generated by the induction coil can be used to heat the steel rod, and the other part is lost in heat exchange with the atmosphere, resulting in a waste of energy. This is the shortcoming of the existing technology. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then proposes a steel bar hot processing auxiliary heating device.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a steel bar hot processing auxiliary heating device, comprising a frame, a left support plate and a right support plate are respectively arranged at both ends of the frame, a heating sleeve is arranged between the left support plate and the right support plate, an induction coil is wound around the outside of the heating sleeve, a steel bar is arranged inside the heating sleeve, both ends of the steel bar extend out of the left support plate and the right support plate, an air suction hood is arranged outside the heating sleeve, the air outlet of the air suction hood is connected to the air inlet of the suction fan; a heating hood is sleeved on the outside of the steel bar at the left end of the left support plate, and the heating hood is connected to the air outlet of the suction fan.

[0006] A further improvement of the utility model is that the heating cover is a circular tube, and an opening is arranged at the bottom of the circular tube.

[0007] A further improvement of the utility model is that the air suction hood includes a vertical plate and an inclined plate fixed on the upper part of the vertical plate, the vertical plate and the inclined plate form a funnel-shaped structure, and the lower end of the vertical plate is connected to the movable plate through a height adjustment mechanism.

[0008] A further improvement of the utility model is that the height adjustment mechanism is an adjusting bolt, a group of waist-shaped holes are arranged on the vertical plate, the long sides of the waist-shaped holes are arranged in the up and down directions, and a bolt hole used in conjunction with the adjusting bolt is arranged on the movable plate.

[0009] A further improvement of the utility model is that the suction fan is connected to the heating hood through a heat recovery pipe, and the outside of the heat recovery pipe is wrapped with heat insulation cotton.

[0010] A further improvement of the utility model is that the heating cover is fixedly connected to the frame through a connecting rod.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model is provided with an air suction hood on the outside of the heating sleeve, and the air outlet of the air suction hood is connected to the air inlet of the suction fan; the steel rod located at the left end of the left support plate is sleeved with a heating hood on the outside, and the heating hood is connected to the air outlet of the suction fan. The waste heat generated by induction heating is sucked into the heating hood through the suction fan, and the steel rod that has not been induction heated is preheated, and the steel rod is auxiliary heated in advance, so that the waste heat is recycled and the waste of heat is reduced. At the same time, by preheating in advance, the stress of the steel rod can be better eliminated and the cracking of the steel rod can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model;

[0014] Figure 2 It is a side view structural schematic diagram of the heating cover of the utility model;

[0015] Figure 3 This is a structural schematic diagram of the movable plate in the utility model being adjusted to the lowest position;

[0016] Figure 4 This is a structural schematic diagram of the movable plate in the utility model being adjusted to the highest position;

[0017] Figure 5 It is a structural schematic diagram of the movable plate in the utility model.

[0018] Among them, 1 is a frame, 2 is a heating cover, 3 is a left support plate, 4 is a steel rod, 5 is a heat recovery pipe, 6 is a suction fan, 7 is a suction cover, 8 is an induction coil, 9 is a heating sleeve, 10 is a right support plate, and 11 is a connecting rod;

[0019] 201 is an opening;

[0020] 501 is thermal insulation cotton;

[0021] 701 is an inclined plate, 702 is a vertical plate, 703 is a movable plate, 704 is an adjusting bolt, 705 is a waist-shaped hole, and 706 is a bolt hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0023] like Figure 1-5 As shown, a steel rod hot processing auxiliary heating device comprises a frame 1, a left support plate 3 and a right support plate 10 are respectively arranged at both ends of the frame 1, a heating sleeve 9 is arranged between the left support plate 3 and the right support plate 10, an induction coil 8 is wound around the outside of the heating sleeve 9, a steel rod 4 is arranged inside the heating sleeve 9, both ends of the steel rod 4 extend out of the left support plate 3 and the right support plate 10, an air suction hood 7 is arranged outside the heating sleeve 9, and the air outlet of the air suction hood 7 is connected to the air inlet of the suction fan 6; a heating hood 2 is sleeved on the outside of the steel rod 4 located at the left end of the left support plate 3, and the heating hood 2 is fixedly connected to the frame 1 through a connecting rod, and the heating hood 2 is connected to the air outlet of the suction fan 6.

[0024] The inductor is turned on to perform induction heating on the steel rod 4, and the suction fan 6 is turned on at the same time. The heat generated by the induction coil 8 of the inductor is transferred to the surface of the steel rod 4 through the heating sleeve 9, thereby heating the steel rod 4. The unused waste heat is transported to the heating cover 2 through the heat recovery pipe 5 under the action of the suction fan 6, thereby preheating the steel rod 4 in the heating cover 2 in advance, thereby achieving the purpose of auxiliary heating.

[0025] The heating cover 2 is a circular tube, and the bottom of the circular tube is provided with an opening 201. The circular tube can be made of ordinary steel pipe, which is low in cost, easy to obtain, and easy to process.

[0026] The air suction hood 7 includes a vertical plate 702 and an inclined plate 701 fixed on the upper part of the vertical plate 702. The vertical plate 702 and the inclined plate 701 form a funnel-shaped structure. The lower end of the vertical plate 702 is connected to the movable plate 703 through a height adjustment mechanism.

[0027] The height adjustment mechanism is an adjustment bolt 704. A group of waist-shaped holes are provided on the vertical plate 702. The long sides of the waist-shaped holes 705 are provided in the up-down direction. The movable plate 703 is provided with a bolt hole 706 used in conjunction with the adjustment bolt 704. By changing the position of the adjustment bolt 704 in the waist-shaped hole 705 and then fixing the movable plate 703, the expansion and contraction of the air suction hood 7 in the height direction is achieved. Figure 3 As shown in FIG. 1 , it is a schematic diagram of the structure in which the movable plate 703 is adjusted to the lowest position. Figure 4 FIG. 7 is a schematic diagram of the structure in which the movable plate 703 is adjusted to the highest position.

[0028] The suction fan 6 is connected to the heating cover 2 via a heat recovery pipe 5 , and the outside of the heat recovery pipe 5 is wrapped with heat insulation cotton 501 . The heat insulation cotton 501 can reduce heat loss and transfer the residual heat in the suction cover 7 to the heating cover 2 to the maximum extent.

[0029] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A steel bar hot processing auxiliary heating device, comprising a frame (1), wherein a left support plate (3) and a right support plate (10) are respectively arranged at two ends of the frame (1), a heating sleeve (9) is arranged between the left support plate (3) and the right support plate (10), an induction coil (8) is wound around the outside of the heating sleeve (9), a steel bar (4) is arranged inside the heating sleeve (9), and both ends of the steel bar (4) extend out of the left support plate (3) and the right support plate (10), characterized in that: The heating sleeve (9) is provided with an air suction hood (7) on the outside, and the air outlet of the air suction hood (7) is connected to the air inlet of the suction fan (6); the steel rod (4) located at the left end of the left support plate (3) is sleeved with a heating hood (2) on the outside, and the heating hood (2) is connected to the air outlet of the suction fan (6).

2. The steel bar hot working auxiliary heating device according to claim 1, characterized in that: The heating cover (2) is a circular tube, and an opening (201) is provided at the bottom of the circular tube.

3. A steel bar hot working auxiliary heating device according to claim 1 or 2, characterized in that: The air suction hood (7) comprises a vertical plate (702) and an inclined plate (701) fixed on the upper part of the vertical plate (702); the vertical plate (702) and the inclined plate (701) form a funnel-shaped structure; the lower end of the vertical plate (702) is connected to the movable plate (703) via a height adjustment mechanism.

4. The steel bar hot working auxiliary heating device according to claim 3 is characterized in that: The height adjustment mechanism is an adjustment bolt (704), a group of waist-shaped holes (705) are arranged on the vertical plate (702), and the long sides of the waist-shaped holes (705) are arranged in the up-down direction, and a bolt hole (706) used in conjunction with the adjustment bolt (704) is arranged on the movable plate (703).

5. The steel bar hot working auxiliary heating device according to claim 1, characterized in that: The suction fan (6) is connected to the heating cover (2) via a heat recovery pipe (5), and the outside of the heat recovery pipe (5) is wrapped with heat insulation cotton (501).

6. The steel bar hot working auxiliary heating device according to claim 1, characterized in that: The temperature raising cover (2) is fixedly connected to the frame (1) via a connecting rod (11).

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