Drying oven for drying wire rods through circulating hot air

Abstract

The utility model provides a drying oven for drying wire rods through circulating hot air, which comprises an oven body, an air suction groove body is fixed on the outer side of the oven body and close to the upper end face of the oven body, an air inlet is arranged on the side wall of the oven body corresponding to the air suction groove body, and an inner cavity of the air suction groove body is communicated with the inside of the oven body through the air inlet. The air suction groove body is communicated with the centrifugal fan through an air inlet pipe and a heater, the centrifugal fan is communicated with the bottom of the box body through an air outlet pipe, and the air inlet, the air suction groove body, the air inlet pipe, the heater, the centrifugal fan and the air outlet pipe sequentially form an airflow circulation channel and are communicated with the interior of the box body. The air inlet, the air suction groove body, the air inlet pipe and the air outlet pipe form the air inlet channel, then the air inlet channel is communicated with the interior of the box body, so that the hot air circulation channel is formed, hot air can circulate in the circulation channel through the circulation channel, the situation of hot air leakage is avoided, the waste gas treatment cost is reduced, meanwhile, waste heat is effectively utilized, and the environment is protected. And the energy utilization rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire surface treatment, and relates to wire rod drying equipment, in particular to an oven for circulating hot air drying wire rods. Background Art

[0002] Wire rod is a metal product, typically made from steel through drawing or rolling. It is widely used in construction, manufacturing, and other industrial fields. The wire rod processing process includes hot rolling, cooling, and pickling, and drying is usually required after pickling. In the traditional online pickling process of wire rod, the drying tank design uses steam to heat the air. The hot air is then blown through a duct system and channels by a centrifugal fan (or axial flow fan) to the surface of the wire rod, removing moisture from the wire rod surface and achieving the purpose of drying the wire rod.

[0003] Existing wire rod drying tanks have the following major drawbacks: 1) Wire rod pickling lines typically use tunnel-type production. In these drying tanks, hot air is drawn from the outside atmosphere. While drying the wire rods, this hot air cannot be reused and must be extracted through pipes in an exhaust gas treatment tower for further treatment, increasing the factory's waste gas treatment costs. 2) While the hot air from these drying tanks reheats the wire rods, it is directly extracted by the exhaust gas treatment tower, preventing the waste heat from being reused, increasing environmental costs. Therefore, a circulating hot air drying oven for wire rod drying is proposed to address these issues. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the defects of the prior art, a drying oven for drying wire rods with circulating hot air is provided, which has the advantages of hot air circulation and solves the problem that hot air cannot circulate.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An oven for drying wire rods with circulating hot air comprises a box body, and is characterized in that: an outer side wall at the top of the box body is sealed with an air suction groove body, an air inlet is opened on the side wall of the box body at a position corresponding to the air suction groove body, and the inner cavity of the air suction groove body is connected with the interior of the box body through the air inlet; the air suction groove body is connected with a centrifugal fan through an air inlet pipe via a heater, and the centrifugal fan is connected with the bottom of the box body through an air outlet pipe, and the air inlet, air suction groove body, air inlet pipe, heater, centrifugal fan, and air outlet pipe sequentially form an air circulation channel and are connected with the interior of the box body.

[0007] Preferably, the air suction trough body is a rectangular parallelepiped with a hollow interior and a missing inner side surface, and its cross-section is a U-shaped structure.

[0008] Preferably, the box body is a trough structure with a hollow interior and a missing top surface, and the lower side wall thereof is connected to the outlet of the air outlet pipe.

[0009] Preferably, a trough bottom placement plate is provided at the middle and lower part of the box body, and a plurality of trough bottom air outlet holes are opened on the trough bottom placement plate, and the trough bottom air outlet holes are square holes or round holes.

[0010] Preferably, the trough bottom placement plate is located above the outlet of the air outlet pipe, and the wire rod body is placed thereon.

[0011] Preferably, the air inlet is a plurality of strip-shaped through holes arranged along the length direction of the air suction trough body, or a plurality of circular through holes arranged at intervals.

[0012] Preferably, there are multiple air inlet pipes, the air inlets of which are respectively arranged on at least two sides of the air suction trough body, and the air outlets are all connected to the centrifugal fan.

[0013] Preferably, a wind shield is fixed on the side wall of the box body corresponding to the air inlet in an upward tilt, and the wind shield is located above the air inlet.

[0014] Preferably, there are four wind shields, which are respectively arranged on the inner side walls of the box body; or the wind shield is a U-shaped plate structure, and its inner periphery is arranged obliquely upward.

[0015] Preferably, the angle a between the wind shield and the inner wall of the box body is 120-135°.

[0016] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0017] (1) The circulating hot air drying oven for wire rods forms an air inlet channel through an air inlet, an air suction trough, an air inlet pipe, and an air outlet pipe, and then connects with the interior of the box body to form a final hot air circulation channel. The hot air can circulate in the circulation channel through the circulation channel to avoid the hot air from leaking out, thereby reducing the waste gas treatment cost, effectively utilizing the waste heat, and improving the energy utilization rate.

[0018] (2) The oven for drying coils with circulating hot air can effectively introduce hot air into the air suction slot body through multiple air inlets when the hot air is circulating. At the same time, the wind shielding plates arranged at the air inlets can further assist the circulation of the hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an oven for circulating hot air drying wire rods according to the present invention;

[0020] Figure 2This is a schematic cross-sectional view of a box in an oven for circulating hot air drying wire rods according to the present invention;

[0021] Figure 3 This is a schematic diagram of the top view of the box body of an oven for circulating hot air drying wire rods in the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the separated box body and exhaust hood in a drying oven for circulating hot air drying wire rods of the present invention;

[0023] Among them, the figures are marked as: 1 suction trough body, 2 air inlet pipe, 3 heater, 4 centrifugal fan, 5 air outlet pipe, 6 box body, 7 wind shield, 8 air inlet, 9 air duct area, 10 trough bottom air outlet, 11 trough bottom placement plate, 12 wire rod body, 13 placement area, 14 exhaust hood. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0026] Example 1:

[0027] See also Figure 1-3 In this embodiment, a circulating hot air drying oven for wire rods includes a box body 6, an outer side wall of the top of the box body 6 is sealed with an air suction groove body 1, and an air inlet 8 is opened on the side wall of the box body 6 at a position corresponding to the air suction groove body 1. The inner cavity of the air suction groove body 1 is connected with the interior of the box body 6 through the air inlet 8; the air suction groove body 1 is connected with the centrifugal fan 4 through the air inlet pipe 2 via the heater 3, and the centrifugal fan 4 is connected with the bottom of the box body 6 through the air outlet pipe 5. The air inlet 8, the air suction groove body 1, the air inlet pipe 2, the heater 3, the centrifugal fan 4, and the air outlet pipe 5 form an air circulation channel in sequence and are connected with the interior of the box body 6.

[0028] During application, the centrifugal fan 4 and the heater 3 are turned on simultaneously. After the centrifugal fan 4 starts running, air inside the box body 6 is drawn into the air suction trough body 1 through the air inlet 8. Then the air passes through the air suction trough body 1 and the air inlet pipe 2 and enters the heater 3, where it is heated into hot air by the heating elements inside. Subsequently, the centrifugal fan 4 sends the hot air into the box body 6 through the air outlet pipe 5 to dry the materials inside the box body 6. The hot air is transmitted from bottom to top inside the box body 6. With the operation of the centrifugal fan 4, the hot air inside the box body 6 is sucked in again through the air inlet 8 under the suction of the centrifugal fan 4 and then sent into the box body 6. Through the above cyclic drying method, the discharge of hot air from the box body 6 can be maximally prevented, reducing the cost and time of tail gas treatment. At the same time, efficient utilization of heat can be achieved, improving the energy utilization rate.

[0029] Embodiment 2:

[0030] The basic content is the same as that of Embodiment 1, with the difference being that:

[0031] Please refer to Figure 1-3 , in this embodiment, the air suction trough body 1 is a cuboid with a hollow interior and a missing inner side surface, and its cross-sectional shape is a zigzag structure. The box body 6 is a trough structure with a hollow interior and a missing top surface, and its lower side wall is connected to the outlet of the air outlet pipe 5. A trough bottom placement plate 11 is provided in the middle and lower part of the box body 6. A number of trough bottom air outlet holes 10 are formed on the trough bottom placement plate 11. The trough bottom air outlet holes 10 are square holes or round holes. The trough bottom placement plate 11 is located above the outlet of the air outlet pipe 5, and a coil body 12 is placed thereon. Inside the box body 6, a placement area 13 and an air duct area 9 are respectively formed. The placement area 13 and the air duct area 9 are respectively located above and below the trough bottom placement plate 11, and the placement area 13 is connected to the air duct area 9 through the trough bottom air outlet holes 10. The coil body 12 is located in the placement area 13. The air inlet 8, the air suction trough body 1, the air inlet pipe 2, the heater 3, the centrifugal fan 4, the air outlet pipe 5, the air duct area 9, and the placement area 13 form an air flow circulation channel in sequence.

[0032] During application, after air enters the air suction trough body 1 through the air inlet 8, it is conveyed to the heater 3 by the air inlet pipe 2 to be heated into hot air, and is introduced into the box body 6 by the air inlet pipe 2 and the air outlet pipe 5. After the hot air enters the box body 6, it first enters the air duct area 9, and then enters the placement area 13 through the trough bottom air outlet holes 10 to dry the coil body 12 on the trough bottom placement plate 11 or the coil body 12 suspended by a special lifting tool. Moreover, the drying efficiency can be improved under the action of the trough bottom air outlet holes 10. Then when the hot air is transmitted upward to the air inlet 8 for circulation, multiple air inlets 8 can effectively suck in the hot air to avoid the leakage of hot air.

[0033] In another specific embodiment, the air inlet 8 is a number of strip-shaped through holes arranged along the length direction of the air suction trough body 1, or a number of circular through holes arranged at intervals.

[0034] Example 3:

[0035] The basic content is the same as Example 1, except that:

[0036] See also Figure 1-3 In this embodiment, multiple air inlet pipes 2 are provided, with their air inlet ends disposed on at least two sides of the air suction trough 1 and their air outlet ends communicating with the centrifugal fan 4. Wind shields 7 are fixed upwardly and tilted to the sidewalls of the housing 6, corresponding to the air inlet 8. Wind shields 7 are located above the air inlet 8. Four wind shields 7 are provided, one on each inner sidewall of the housing 6. Alternatively, the wind shields 7 are U-shaped plates with their inner peripheries tilted upward. The angle a between the wind shields 7 and the inner sidewall of the housing 6 is 120-135°. Preferably, the angle a between the wind shields 7 and the inner sidewall of the housing 6 is 125-130°.

[0037] When in use, after the hot air is transmitted upward to the air inlet 8, the wind shield 7 can effectively block the hot air, so that the hot air can effectively enter the air suction trough 1 through the air inlet 8.

[0038] Example 4:

[0039] The basic content is the same as Example 1, except that:

[0040] See also Figure 4 In this embodiment, an exhaust hood 14 is provided above the box body 6.

[0041] During application, after the material is dried, the centrifugal fan 4 and the heater 3 are turned off, and the exhaust hood 14 is turned on, and the hot air remaining in the box 6 can be extracted.

[0042] In summary, the working principle of the circulating hot air drying oven for wire rods is as follows: start the centrifugal fan 4, and the centrifugal fan 4 draws the air inside the box 6 into the heater 3 through the air inlet pipe 2, the air suction trough 1 and the air inlet 8. The heater 3 heats the air to the temperature required for the process, so the hot air enters the centrifugal fan 4, and is sent into the air duct area 9 through the air outlet pipe 5 of the centrifugal fan 4. The hot air is then blown upward through the air outlet hole 10 at the bottom of the trough to dry the wire rod body 12. The hot air that has heated the wire rod body 12 enters the air inlet pipe 2 through the air inlet 8 and the air suction trough 1 to carry out the next hot air cycle.

[0043] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0044] Secondly, the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention can be combined with each other.

[0045] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oven for circulating hot air drying wire rods, comprising a housing, characterized in that: An air suction trough is sealed on the outer wall of the top of the box body, and an air inlet is opened on the side wall of the box body at a position corresponding to the air suction trough body. The inner cavity of the air suction trough body is connected with the interior of the box body through the air inlet; the air suction trough body is connected with the centrifugal fan through the air inlet pipe via the heater, and the centrifugal fan is connected with the bottom of the box body through the air outlet pipe. The air inlet, air suction trough body, air inlet pipe, heater, centrifugal fan and air outlet pipe form an air circulation channel in sequence and are connected with the interior of the box body.

2. The oven for drying wire rods with circulating hot air according to claim 1, characterized in that: The air suction trough body is a rectangular parallelepiped with a hollow interior and a missing inner side surface, and its cross-section is a U-shaped structure.

3. The oven for drying wire rods with circulating hot air according to claim 1, characterized in that: The box body is a trough structure with a hollow interior and a missing top surface, and the lower side wall thereof is connected to the outlet of the air outlet pipe.

4. The oven for drying wire rods with circulating hot air according to claim 1, characterized in that: A trough bottom placement plate is provided at the middle and lower part of the box body, and a plurality of trough bottom air outlet holes are opened on the trough bottom placement plate, and the trough bottom air outlet holes are square holes or round holes.

5. The oven for drying wire rods with circulating hot air according to claim 4, characterized in that: The trough bottom placement plate is located above the outlet of the air outlet pipe, and the wire rod body is placed thereon.

6. The oven for circulating hot air drying wire rod according to claim 1, characterized in that: The air inlets are a plurality of strip-shaped through holes arranged along the length direction of the air suction slot body, or a plurality of circular through holes arranged at intervals.

7. The oven for circulating hot air drying wire rod according to claim 1, characterized in that: There are multiple air inlet pipes, and the air inlet ends of the air inlet pipes are respectively arranged on at least two sides of the air suction trough body, and the air outlet ends are connected to the centrifugal fan.

8. The oven for drying wire rods with circulating hot air according to claim 1, characterized in that: A wind shielding plate is fixed on the side wall of the box body in an upward tilt corresponding to the air inlet, and the wind shielding plate is located above the air inlet.

9. The oven for drying wire rods with circulating hot air according to claim 8, characterized in that: There are four wind shields, which are respectively arranged on the inner side walls of the box body; or the wind shield is a U-shaped plate structure, and its inner periphery is arranged inclined upward.

10. The oven for drying wire rods with circulating hot air according to claim 8, characterized in that: The included angle a between the wind shield and the inner wall of the box body is 120-135°.

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